S3 i9305 - problematic wifi. - Galaxy S III I9305 (4G LTE + 2GB RAM) Q&A, Help &

Hello guys,
I just want to share this problem with my S3 LTE i9305, this unit came from singapore (singtel), and im now using it in Cebu, Philippines. However i am having too much trouble with its wifi always getting Authentication errors (when i was still in stock firmware).
I should say i can rule out that my wifi hardware is defective, because I was using the wifi yesterday whole night in our house. downloading stuffs from play store, browsing, facebook and etc.
This is what i already did:
1. downloaded a Hongkong firmware (official samsung stock firmware) flashed with odin with no problem. hoping that the wifi issue is just a corrupt base firmware.
- still wifi is problmatic
2. Im on Cyanogenmod 10.1 4.2.2 Jellybean
- all functions are okay except for the wifi
WIFI SETUP:
keep wi-fi on during sleep: always
wi-fi frequency band: auto
wi-fi region code: usa
wifi optimiation: unchecked
It can seem to detect new wifi with strong signals but whenever you connect to it the signal 'literally' drops to one bar, and stop doing the connection.
the problem is intermittent, meaning:
sometimes it works, sometimes its not - and there is no definite time when it works and when not.
here are the details of my current device:
Baseband version: I9305ZHBMI2
Kernel Version: 3.0.64-CM-g9c2e2b; [email protected] #1; mon sep 23 15:03:19 pdt
Cyanogenmod version: 10.1.3-i9305
Build Number: cm_i9305-userdebug 4.2.2 JDQ39E; eng.jenkins.20130923.145024 test-keys

bercerobry said:
Hello guys,
I just want to share this problem with my S3 LTE i9305, this unit came from singapore (singtel), and im now using it in Cebu, Philippines. However i am having too much trouble with its wifi always getting Authentication errors (when i was still in stock firmware).
I should say i can rule out that my wifi hardware is defective, because I was using the wifi yesterday whole night in our house. downloading stuffs from play store, browsing, facebook and etc.
This is what i already did:
1. downloaded a Hongkong firmware (official samsung stock firmware) flashed with odin with no problem. hoping that the wifi issue is just a corrupt base firmware.
- still wifi is problmatic
2. Im on Cyanogenmod 10.1 4.2.2 Jellybean
- all functions are okay except for the wifi
WIFI SETUP:
keep wi-fi on during sleep: always
wi-fi frequency band: auto
wi-fi region code: usa
wifi optimiation: unchecked
It can seem to detect new wifi with strong signals but whenever you connect to it the signal 'literally' drops to one bar, and stop doing the connection.
the problem is intermittent, meaning:
sometimes it works, sometimes its not - and there is no definite time when it works and when not.
here are the details of my current device:
Baseband version: I9305ZHBMI2
Kernel Version: 3.0.64-CM-g9c2e2b; [email protected] #1; mon sep 23 15:03:19 pdt
Cyanogenmod version: 10.1.3-i9305
Build Number: cm_i9305-userdebug 4.2.2 JDQ39E; eng.jenkins.20130923.145024 test-keys
Click to expand...
Click to collapse
PS: I have used search on this forum and tried the quick fixes.. i also saw sa wifi fix zip for 4.1.2 from another thread and flashed it via CWM but still problem persist...
Id be glad if you can walk me through the troubleshooting process.

bercerobry said:
PS: I have used search on this forum and tried the quick fixes.. i also saw sa wifi fix zip for 4.1.2 from another thread and flashed it via CWM but still problem persist...
Id be glad if you can walk me through the troubleshooting process.
Click to expand...
Click to collapse
You forgot to read the rules No bumping posts .
Wipe phone flash stock rom and test fails you need a service centre .

JJEgan said:
You forgot to read the rules No bumping posts .
Wipe phone flash stock rom and test fails you need a service centre .
Click to expand...
Click to collapse
hello! sorry about early bumping.
with wiping phone flash stock rom <<-- how do i do this? and not corrupting any vital stuff inside my phone. I heard that EFS is a very important.
update:
if you're talking about these:
1.wipe data/factory reset
2. wipe cache
3. wipe dalvic cache
i did those stuff 10x already...
PROBLEM is INTERMITTENT: sometime it will connect just fine, sometimes not. << how am I going to work around this problem?
is there any way to low level diagnose the wifi system?
could it just be the hardware? - if hardware then there shouldn't be times that it can connect fine
could it be the software? - where to start?
How i wish someone can help me fix all these intermittent problems I am encountering with the wifi.

EFS etc its all in the Faqs and Guides .

JJEgan said:
EFS etc its all in the Faqs and Guides .
Click to expand...
Click to collapse
Hi, i have been reading those giudes, and i havent encountered any special method of wiping as what you say... I have used odin to flash like 5x already, got into cwm wipe data, wipe cache and wipe dalvik cache...
I already have a backup of my efs in .img format, using terminal.
Can you walk me through?

Wipe phone flash stock rom and test .

I believe flashing via odin using stock samsung rom will wipe the flash. Is that correct? Or do you mean to say format the flash chip first before flashing with odin?... Im not quite sure how to do that.
Right now im using my celfone posting this message. Its just that this fone doesnt connect to other access points where the rest of wifi devices connects fine.
if you are referring to this guide:
http://forum.xda-developers.com/showthread.php?t=1911726
i have done this many times already.
Sent from my GT-I9305 using Tapatalk

I have tried alot of different ROMS already and the problem persists.
Could this be hardware related?
are there people whos got similar issue?
It can connect to wifi right away if you're 2 meters line of sight of the router/access point.

bercerobry said:
I have tried alot of different ROMS already and the problem persists.
Could this be hardware related?
are there people whos got similar issue?
It can connect to wifi right away if you're 2 meters line of sight of the router/access point.
Click to expand...
Click to collapse
Yes it could be.My phone had intermittent wfi and data.Turns out it was an "RF loopback timeout" problem.Needed fixing at service centre.HTH.

Related

[9001] Wifi and Bluetooth issues

hello everyone, I just registered here for a couple issues with my girlfriend's i9001, it basically can't find Wifi connections, once you click the button to activate the wifi, it shows a green check for few mins while looking for connections and suddenly it deactivates by itself...
I read around about a file to remove via terminal emulator, the bcm_supp.conf one, but I can't find that file...
does anyone have any idea/solution for it? currently she uses internet via 3g (monthly charges) but it would be cool to be able to use the home wifi...
about bluetooth instead, it just can't find other bluetooth devices and vice versa, my nokia 5800 can't find it even if the "visible" option is activated.
ideas?
I'm going crazy about it, I already tried several hard resets and flashed the phone first with 2.3.5 and then with 2.3.6 firmwares... nothing fixed the issues...
thanks in advance for any response
ps: sorry for my english, I'm italian >_<
i had exactly the same wifi issue but flashing a new rom solved the problem. reset and reflashing the same rom didn't help. you tried several 2.3.6 versions?
you might try flashing another modem.
dr.wtf said:
i had exactly the same wifi issue but flashing a new rom solved the problem. reset and reflashing the same rom didn't help. you tried several 2.3.6 versions?
you might try flashing another modem.
Click to expand...
Click to collapse
it had the official 2.3.5 (italy), I flashed it with the same firmware and nothing happened, re-flashed it with 2.3.6 (Baltic 13th June 2012) and nothing happened...
noone knows?

WIFI ERROR \ Turnning on \ Wifi Goes To Grey

Hello Everybody ... Am a new member to Xda site but i learned alot through reading your posts long time ago...
anyway here is my problem MY GALAXY NOTE GTN7000 Wifi Is not Working....
Details: I Had The phone since febraury 2012 and it was GB 2.3.6
i Updated to I.C.S 4.0.3 Official Rom and rooted it in july 2012
suddenly in august 2012 the problem started to appear ((( Am Writing Dates so To Avoid the Possibility of Hard Brick or anything because the phone was working great till then )))
THE PROBLEM
1-When I Try To Open Wifi It just Lag and stop responding The ICON GOES TO GREY INSTEAD OF GREEN and stays like that till Reboot and some times stays grey after Reboot
2- when opening wifi from settings tab it says "Turning On Wifi " and stays like that Forever
3- the only Way To restore the wifi icon to white is trying to activate WIFI - Direct
4- Rebooting Used to fix the problem but now NOT
5- Removing the battery Used to fix the problem But NOW NOT
Fixes I Tried
1- Restore Factory Setting & Wipe Cache & Wipe Everything
2- Changing the Rom from (I.C.S 4.0.3 )to (GB 2.3.6 ) to (Paranoid Android ) to (I.C.S 4.0.4)
Sometimes after each format or rom flash wifi worked for 2 hours or even 24 hours normally then problem appear
3- Tried removing Wpa Supplicant ( Helped Sometimes Then NOT )
4- Tried Wifix TO change country code even manually did it
5- Adjusted the Nfram_Semacove i dnt remember the name actually from CC To All ( Worked then later Stopped )
6- Used Wifi Rescue (Worked for a while then Stopped )
7- I Flashed Alot of kernels ((Heared that syiah Kernal Fix this problem but nothing out for NOTE YET )
HELP
I know that many will think that its a hardware ISSUE BUT IF Its hardware then why sometimes it work !!!!!
What i really Think is : Its a BUG Changed some files of the system which are not restored by flashing new ROM !!! for example when i Flashed Roms and Kernels i Found WPA Supplicant unchanged with my router Config !!!!
I SENT THE PHONE TO CUSTOMER SERVICE AND THEY SAID WILL CHECK AND REPLY within24 hrs but for sure its hardware and change Board which means 2800 EGP which is the price of new SGs2 soo am sure its a Bug or Software CAN ANY1 Help MEEEEEE
MOHPHR said:
Hello Everybody ... Am a new member to Xda site but i learned alot through reading your posts long time ago...
anyway here is my problem MY GALAXY NOTE GTN7000 Wifi Is not Working....
Details: I Had The phone since febraury 2012 and it was GB 2.3.6
i Updated to I.C.S 4.0.3 Official Rom and rooted it in july 2012
suddenly in august 2012 the problem started to appear ((( Am Writing Dates so To Avoid the Possibility of Hard Brick or anything because the phone was working great till then )))
THE PROBLEM
1-When I Try To Open Wifi It just Lag and stop responding The ICON GOES TO GREY INSTEAD OF GREEN and stays like that till Reboot and some times stays grey after Reboot
2- when opening wifi from settings tab it says "Turning On Wifi " and stays like that Forever
3- the only Way To restore the wifi icon to white is trying to activate WIFI - Direct
4- Rebooting Used to fix the problem but now NOT
5- Removing the battery Used to fix the problem But NOW NOT
Fixes I Tried
1- Restore Factory Setting & Wipe Cache & Wipe Everything
2- Changing the Rom from (I.C.S 4.0.3 )to (GB 2.3.6 ) to (Paranoid Android ) to (I.C.S 4.0.4)
Sometimes after each format or rom flash wifi worked for 2 hours or even 24 hours normally then problem appear
3- Tried removing Wpa Supplicant ( Helped Sometimes Then NOT )
4- Tried Wifix TO change country code even manually did it
5- Adjusted the Nfram_Semacove i dnt remember the name actually from CC To All ( Worked then later Stopped )
6- Used Wifi Rescue (Worked for a while then Stopped )
7- I Flashed Alot of kernels ((Heared that syiah Kernal Fix this problem but nothing out for NOTE YET )
HELP
I know that many will think that its a hardware ISSUE BUT IF Its hardware then why sometimes it work !!!!!
What i really Think is : Its a BUG Changed some files of the system which are not restored by flashing new ROM !!! for example when i Flashed Roms and Kernels i Found WPA Supplicant unchanged with my router Config !!!!
I SENT THE PHONE TO CUSTOMER SERVICE AND THEY SAID WILL CHECK AND REPLY within24 hrs but for sure its hardware and change Board which means 2800 EGP which is the price of new SGs2 soo am sure its a Bug or Software CAN ANY1 Help MEEEEEE
Click to expand...
Click to collapse
Nobody is Having The Same Issue ???? Any Ideas !!!? Also Reseting Wifi Doesnt Work by #526# says Driver Not Set NG error Please I Need Help ...Thanx
MOHPHR said:
Nobody is Having The Same Issue ???? Any Ideas !!!? Also Reseting Wifi Doesnt Work by #526# says Driver Not Set NG error Please I Need Help ...Thanx
Click to expand...
Click to collapse
I am also facing the same problem for last one month and tried almost all the options tried by you but no relief. Wifi just works some time and other times it stays greyed. Can any one suggest any other solution as i also think it's software problem.
jesus christ, we are not BLIND!
anyway, i have same issues on sgs2
Same issue
@MOHPHR : I am facing the same issue as you.
I tried several ROMs from Original stock ICS to Paranoid to Crisleko's ROM.
Going into the airplane mode and then turning wifi on used to work, not anymore.
3G Data works just fine, not being able to use wifi is frustrating because when I leave it alone, it connects by itself randomly when I am at home for example.
I have done some extensive research and found an article that mentions wifi hardware problems resulting from ICS update on a galaxy S2. (Google: Samsung Galaxy S2 WiFi Issue BY Shaiful Borhan )
I did use the *#*#526#*#* and got the status: "NotSet Driver loaded [NG]".
Anyone can help please ?
WiFi drivers are not installed properly. Flash stock GB firmware
Sent from my GT-N7000 using xda app-developers app
Smokinggun said:
WiFi drivers are not installed properly. Flash stock GB firmware
Sent from my GT-N7000 using xda app-developers app
Click to expand...
Click to collapse
i have seen this before and that was a hardware problem.. not saying this would as well be but its a possibility
nokiamodeln91 said:
i have seen this before and that was a hardware problem.. not saying this would as well be but its a possibility
Click to expand...
Click to collapse
I had the same issue with Galaxy S, tired some custom roms but nothing worked and finally tried with stock GB it worked
Any fix?
MOHPHR said:
Hello Everybody ... Am a new member to Xda site but i learned alot through reading your posts long time ago...
anyway here is my problem MY GALAXY NOTE GTN7000 Wifi Is not Working....
Details: I Had The phone since febraury 2012 and it was GB 2.3.6
i Updated to I.C.S 4.0.3 Official Rom and rooted it in july 2012
suddenly in august 2012 the problem started to appear ((( Am Writing Dates so To Avoid the Possibility of Hard Brick or anything because the phone was working great till then )))
THE PROBLEM
1-When I Try To Open Wifi It just Lag and stop responding The ICON GOES TO GREY INSTEAD OF GREEN and stays like that till Reboot and some times stays grey after Reboot
2- when opening wifi from settings tab it says "Turning On Wifi " and stays like that Forever
3- the only Way To restore the wifi icon to white is trying to activate WIFI - Direct
4- Rebooting Used to fix the problem but now NOT
5- Removing the battery Used to fix the problem But NOW NOT
Fixes I Tried
1- Restore Factory Setting & Wipe Cache & Wipe Everything
2- Changing the Rom from (I.C.S 4.0.3 )to (GB 2.3.6 ) to (Paranoid Android ) to (I.C.S 4.0.4)
Sometimes after each format or rom flash wifi worked for 2 hours or even 24 hours normally then problem appear
3- Tried removing Wpa Supplicant ( Helped Sometimes Then NOT )
4- Tried Wifix TO change country code even manually did it
5- Adjusted the Nfram_Semacove i dnt remember the name actually from CC To All ( Worked then later Stopped )
6- Used Wifi Rescue (Worked for a while then Stopped )
7- I Flashed Alot of kernels ((Heared that syiah Kernal Fix this problem but nothing out for NOTE YET )
HELP
I know that many will think that its a hardware ISSUE BUT IF Its hardware then why sometimes it work !!!!!
What i really Think is : Its a BUG Changed some files of the system which are not restored by flashing new ROM !!! for example when i Flashed Roms and Kernels i Found WPA Supplicant unchanged with my router Config !!!!
I SENT THE PHONE TO CUSTOMER SERVICE AND THEY SAID WILL CHECK AND REPLY within24 hrs but for sure its hardware and change Board which means 2800 EGP which is the price of new SGs2 soo am sure its a Bug or Software CAN ANY1 Help MEEEEEE
Click to expand...
Click to collapse
Hi, I have been looking for days now for a forum that will be discussing this exact problem. I ve had this issue fora month or so now. I have restored to factory settings but it has not solved the problem. My galaxy note n7000 is not rooted nor does it have any special rom. I wouldnt even know how to install them. Where you able to find a fix? I am so tired of this problem, Im even contemplating the possibility of getting a note 2 and selling my n7000. I believe as well that it is most likely a software problem and im wondering if the soon to come jellly bean update could fix this issue.
Ps: after the wifi problem started, ive also noticed freezes and restars/ reboots.
Thanks for your help guys.:good:
Lebanesemecrazy said:
Hi, I have been looking for days now for a forum that will be discussing this exact problem. I ve had this issue fora month or so now. I have restored to factory settings but it has not solved the problem. My galaxy note n7000 is not rooted nor does it have any special rom. I wouldnt even know how to install them. Where you able to find a fix? I am so tired of this problem, Im even contemplating the possibility of getting a note 2 and selling my n7000. I believe as well that it is most likely a software problem and im wondering if the soon to come jellly bean update could fix this issue.
Ps: after the wifi problem started, ive also noticed freezes and restars/ reboots.
Thanks for your help guys.:good:
Click to expand...
Click to collapse
I am having the same problem with a n7000. The best rom i have tried is cm 9.1. I still have this problem but it ocurr less times.
I am thinking that it is somthing of harware, i will try to use the guarantee...
Any ideas there?
Fix Wi-Fi not working under ICS 4.0.1 & 4.0.3
Try this fix
http://forum.xda-developers.com/showthread.php?t=1436683
4thdimension said:
I am also facing the same problem for last one month and tried almost all the options tried by you but no relief. Wifi just works some time and other times it stays greyed. Can any one suggest any other solution as i also think it's software problem.
Click to expand...
Click to collapse
Lebanesemecrazy said:
Hi, I have been looking for days now for a forum that will be discussing this exact problem. I ve had this issue fora month or so now. I have restored to factory settings but it has not solved the problem. My galaxy note n7000 is not rooted nor does it have any special rom. I wouldnt even know how to install them. Where you able to find a fix? I am so tired of this problem, Im even contemplating the possibility of getting a note 2 and selling my n7000. I believe as well that it is most likely a software problem and im wondering if the soon to come jellly bean update could fix this issue.
Ps: after the wifi problem started, ive also noticed freezes and restars/ reboots.
Thanks for your help guys.:good:
Click to expand...
Click to collapse
fedetipito said:
I am having the same problem with a n7000. The best rom i have tried is cm 9.1. I still have this problem but it ocurr less times.
I am thinking that it is somthing of harware, i will try to use the guarantee...
Any ideas there?
Click to expand...
Click to collapse
@fedetipito I am still considering the hardware issue, although it seems a compatibility issue with the region/country as @fearkillerr mentioned in this post (http://forum.xda-developers.com/showthread.php?t=1436683)
I tried his solutions, none worked. The script one worked, but only once, then the problem kept repeating.
I upgraded to JB 4.2 then downgraded to stock GB 2.3 still the same issue. I am from the North Africa/Middle-East region, although when I was in Sweden in holidays and using a Swedish sim-card didn't have this issue. Any thoughts ? This problem is really really upsetting as we cannot use the WiFi properly. I am seriously considering simply abandoning my Galaxy Note N7000 and go for an iPhone 5, simply because I cannot even sell it (since no one would like a smartphone that doesn't have a proper wifi working).
I am having almost same problem with WiFi after I installed Custom ROM.
I tried only one method and it worked like a charm.
Go to WiFi connections and tell your phone to forget the network you are connected to, then re log. This problem did not happen after that 3 days now. Good Luck.
@Valium10 we initially cannot connect to any WiFi network, so we can't "forget" them. I don't think it is a "wifi network" problem.
" although when I was in Sweden in holidays and using a Swedish sim-card didn't have this issue"
And if you take SIM card out and power-on phone?Will wifi work?
Sent from my GT-N7000 using Tapatalk 2
Sometimes no, sometimes yes. It's kind of a malicious bug.
I am also facing the same problem and it seems it is hardware problem. May some dust or something else on the hardware or else we have dropped our phone some problem is there. When I gave to service center they asked that the motherboard needs to be replaced. But they refused to check it without that. I told that first try without replacing any parts and just check whats wrong in this if some repair can be done, but the service center people are so busy 50-60 peoples were waiting in line behind me to give there phones for service. They do not listen anything. They have tried by installing latest ROM and nothing else, that we can easily do it and for that also they have taken service charges.
Please someone tell me where exactly the wifi module is there, so we can open and check the problem ourself.
Lebanesemecrazy said:
Hi, I have been looking for days now for a forum that will be discussing this exact problem. I ve had this issue fora month or so now. I have restored to factory settings but it has not solved the problem. My galaxy note n7000 is not rooted nor does it have any special rom. I wouldnt even know how to install them. Where you able to find a fix? I am so tired of this problem, Im even contemplating the possibility of getting a note 2 and selling my n7000. I believe as well that it is most likely a software problem and im wondering if the soon to come jellly bean update could fix this issue.
Ps: after the wifi problem started, ive also noticed freezes and restars/ reboots.
Thanks for your help guys.:good:
Click to expand...
Click to collapse
sO?
Can anybody tell me if there's some new solution?
cause I've tried all you said here. even in the links but it does the same.
the icon returns to gray color after a few secs in green.
I'm on Jellybean galactus 3.3
pls answer me
Having the same issue with wifi and frequent freezes, tried different ROMs, Kernels and Modems. Yet still Wifi disconnects at various intervals. The phones at time hangs too to what seems to be a SLEEP OF DEATH. Ideas please...
juliobahar said:
Having the same issue with wifi and frequent freezes, tried different ROMs, Kernels and Modems. Yet still Wifi disconnects at various intervals. The phones at time hangs too to what seems to be a SLEEP OF DEATH. Ideas please...
Click to expand...
Click to collapse
for Wifi disconnects ..try to change the router wireless settings to b/g...and avoid n... this should keep the wifi stable

[JB} Loosing network connection after some time

Hi,
I have a strange issue with my SGS Advance.
After some time I loose my network connection. I cannot call, sms or use my mobile data. I have to reboot my phone to get this working again (wifi continues to work). This usually happens around 1 or 2 times a day.
I don't get any message. My mobile data icons just disappears. I sometimes still see reception bars.
Currently I'm running the following:
Modem: I9070XXLPZ
Rom: JZ054K.I9070XXLPZ
Kernel: Thunderzap-Reloaded-3.5
But the problem didn't only occur with this setup. I had it with stock XXLPY (which I installed twice with full data wipes).
After that I installed XXLPZ with full data wipe. The problem still occured. The latest update was the change to the Thunderzap Kernel.
Any suggestions?
My suggestion is to flash a baseband appropriate to your region
All flaming/bashing posts from this account represent LewisGauss' opinion.
joostp said:
Hi,
I have a strange issue with my SGS Advance.
After some time I loose my network connection. I cannot call, sms or use my mobile data. I have to reboot my phone to get this working again (wifi continues to work). This usually happens around 1 or 2 times a day.
I don't get any message. My mobile data icons just disappears. I sometimes still see reception bars.
Currently I'm running the following:
Modem: I9070XXLPZ
Rom: JZ054K.I9070XXLPZ
Kernel: Thunderzap-Reloaded-3.5
But the problem didn't only occur with this setup. I had it with stock XXLPY (which I installed twice with full data wipes).
After that I installed XXLPZ with full data wipe. The problem still occured. The latest update was the change to the Thunderzap Kernel.
Any suggestions?
Click to expand...
Click to collapse
I was facing network lost problem in gb 2.3.6 but after upgrading to jb 4.1.2 I9070XXLQ4 my problem is solved.
Samsung Galaxy S Advance
Rom : Jelly Bean 4.1.2 I9070XXLQ4
Kernel: CoCore E-4.2-TWRP
CallMeVentus said:
My suggestion is to flash a baseband appropriate to your region
All flaming/bashing posts from this account represent LewisGauss' opinion.
Click to expand...
Click to collapse
Thanks for the tip.
According to the stock overview topic here the latest version for the Netherlands is I9070XXLD1.
Can I use the modem from this GB rom on my JB setup or will this conflict?
joostp said:
Thanks for the tip.
According to the stock overview topic here the latest version for the Netherlands is I9070XXLD1.
Can I use the modem from this GB rom on my JB setup or will this conflict?
Click to expand...
Click to collapse
Can anyone confirm if I can use this modem?
I'm curious as well if this works.
Facing the same problem.
tl883 said:
I'm curious as well if this works.
Facing the same problem.
Click to expand...
Click to collapse
Hmm I just tried to flash the modem. I thought I succeeded, no errors in Odin.
But it still says I9070XXLPZ on my system info.

[Q] Mobile network crisis after flash

So, I'm having some issues regarding my recently flashed XSP C5302.
Model: C5302
Android Version: 4.3
Baseband version: 8960A-AAAAATAZQ-40031007-18
Build number: 12.1.A.1.201
I'm on locked BL.
Thing is, I flashed it as soon as I got my hands on it due to that annoying flickering screen, tried to downgrade it to 4.2.1. It was the first time I did that, so I went through many tuts to get it right.
At first I flashed a .254 rom, and when I entered the About screen, model had switched to C5303. What I did was follow DoomLord's guide to root it, instal CWR and flashed a deodexed .254 rom for C5302(this one: http://forum.xda-developers.com/showthread.php?t=2423625). Everything back to normal.
But then I noticed my mobile data wasn't working, so I thought it may have been fault of the deodexed rom. Sooo, I upgraded it AGAIN to 4.3 using PC Companion, just to find out that the mobile issue was not having the APN correctly configured. Sigh.
And well, I'm now stuck again on 4.3, but at least my mobile data package is working. However, it's extremely slow. I mean, I can see the H and H+ icon, but even on H+ it takes ages to send messages and connect. At first I wondered if the baseband had anything to do with it, but when I flashed the rom I checked everything but Kernel and System, so...
So my question is, is it possible that I did something that "damaged" my mobile data connectivity? If so, could somebody please suggest any solution? I must say, my service provider sucks, so it could be their problem too, and I'm just here crying over spilled milk with no reason at all.
Thanks in advance!
Probably your service provider - I must have tried 100's of custom roms and whilst some have meant that data didn't work, this was caused by buggy software, never damage to the phone.
Parkside said:
Probably your service provider - I must have tried 100's of custom roms and whilst some have meant that data didn't work, this was caused by buggy software, never damage to the phone.
Click to expand...
Click to collapse
Yes, I'm pretty sure too, but oh I was so damn worried! Thanks

Cant Turned on WIFI/BT, Already Flashed for BT still not working

Hi , its been a year since i bought xiaomi mi 9-global rom(128GB) and all work properly.
if im not mistaken the first rom when i bought is MIUI 10 , then the last time i update if im not mistaken is around september in MIUI 12.02 for the latest security patch.
Suddenly problem occurs recently maybe around a week. where my Wifi & Bluetooth disconnected by the system and cant be turned on but it fixed it self as i restart and now its never fixed.
I already some of fixed below :
- Restart devices
- Wipe all data
- Factory reset
- Try to flash the ROM from official one MIUI 12.02
- Following some tutorials that reset bluetooth and wifi settings
- Try downgrading MIUI version to 11
but still didnt work the Wifi & Bluetooth setting always crash & cant be turned on , try CIE or CIU test found out that the proximity sensor also didn't work.
I also tried some tutorials that do in EDL mode to install persist mode but its not working due to the Authentication it says" i dont have the permission"
Is there anyway i can fixed the Bluetooth & Wifi in this device?? The Mobile Data is still working and other features still working except Proximity Sensor, WIFI, Bluetooth.
Is the only way is to let the xiaomi store fixed it?? this is my only phone so i need it alot and the office store probably going to take long since pandemic.
Please help me Xiaomi Pro's out there :crying:
Edit :
- my xiaomi account already match with the phone the proof is i can unlocked OEM using the xiaomi. But it seems i still dont have permissions to flash EDL.
ohookayy said:
Hi , its been a year since i bought xiaomi mi 9-global rom(128GB) and all work properly.
if im not mistaken the first rom when i bought is MIUI 10 , then the last time i update if im not mistaken is around september in MIUI 12.02 for the latest security patch.
Suddenly problem occurs recently maybe around a week. where my Wifi & Bluetooth disconnected by the system and cant be turned on but it fixed it self as i restart and now its never fixed.
I already some of fixed below :
- Restart devices
- Wipe all data
- Factory reset
- Try to flash the ROM from official one MIUI 12.02
- Following some tutorials that reset bluetooth and wifi settings
- Try downgrading MIUI version to 11
but still didnt work the Wifi & Bluetooth setting always crash & cant be turned on , try CIE or CIU test found out that the proximity sensor also didn't work.
I also tried some tutorials that do in EDL mode to install persist mode but its not working due to the Authentication it says" i dont have the permission"
Is there anyway i can fixed the Bluetooth & Wifi in this device?? The Mobile Data is still working and other features still working except Proximity Sensor, WIFI, Bluetooth.
Is the only way is to let the xiaomi store fixed it?? this is my only phone so i need it alot and the office store probably going to take long since pandemic.
Please help me Xiaomi Pro's out there :crying:
Edit :
- my xiaomi account already match with the phone the proof is i can unlocked OEM using the xiaomi. But it seems i still dont have permissions to flash EDL.
Click to expand...
Click to collapse
I would try to follow flashing method from xiaomi.eu
https://xiaomi.eu/community/threads/miui-12-0-stable-release.56191/
Laptapper said:
I would try to follow flashing method from xiaomi.eu
Click to expand...
Click to collapse
Im a new user so i cant post link above
Click to expand...
Click to collapse
thanks for the answers , is it save to flash using EU ROM? last time when i browsing for fix tutorials i read some forum here about redmi user if im not mistaken that get the phone locked for 30 days after using custom ROM when he tried to revert it back. do you think its save ? mine is global version
ohookayy said:
thanks for the answers , is it save to flash using EU ROM? last time when i browsing for fix tutorials i read some forum here about redmi user if im not mistaken that get the phone locked for 30 days after using custom ROM when he tried to revert it back. do you think its save ? mine is global version
Click to expand...
Click to collapse
I think it's safe as miui could be.
But be shure to follow step by step and take right rom version. If it's working you can flash original miui or custom roms.
Laptapper said:
I would try to follow flashing method from xiaomi.eu
Click to expand...
Click to collapse
Laptapper said:
I think it's safe as miui could be.
But be shure to follow step by step and take right rom version. If it's working you can flash original miui or custom roms.
Click to expand...
Click to collapse
Thanks for the suggestion, after i tried to flash to EU ROM i got new MIUI version which 12.04 , in global its 12.02. However the problem still happening or still remain unsolved. The bluetooth & wifi still cant be turned on, i tried on CIT it also not working and everytime the i try to open wifi & bluetooth settings , the settings always freeze and crash probably because it error. Is there any other solution you can provide?
Thanks
ohookayy said:
Thanks for the suggestion, after i tried to flash to EU ROM i got new MIUI version which 12.04 , in global its 12.02. However the problem still happening or still remain unsolved. The bluetooth & wifi still cant be turned on, i tried on CIT it also not working and everytime the i try to open wifi & bluetooth settings , the settings always freeze and crash probably because it error. Is there any other solution you can provide?
Thanks
Click to expand...
Click to collapse
I think, if you have done a really clean flash with formating data, that it's a hardware problem.
Laptapper said:
I think, if you have done a really clean flash with formatting data, that it's a hardware problem.
Click to expand...
Click to collapse
yes, i did i already follow the instructions & having no error at all for the ROM and other stuff except the WiFi & Bluetooth.
But for me its just really weird, my phone looks still great from outside no bend, dent, or crack it never fall as well.
The problem starts occurring by itself like the system is forcing the Bluetooth & WiFi to off then at some point the WiFi is connected but not transferring any data after restart everything fixed then its not working at all, which when i tried to turn it on it will freeze or the system not responding or off by itself.
btw appreciate your answer, i'm still waiting for other solution if possible :crying:
ohookayy said:
yes, i did i already follow the instructions & having no error at all for the ROM and other stuff except the WiFi & Bluetooth.
But for me its just really weird, my phone looks still great from outside no bend, dent, or crack it never fall as well.
The problem starts occurring by itself like the system is forcing the Bluetooth & WiFi to off then at some point the WiFi is connected but not transferring any data after restart everything fixed then its not working at all, which when i tried to turn it on it will freeze or the system not responding or off by itself.
btw appreciate your answer, i'm still waiting for other solution if possible :crying:
Click to expand...
Click to collapse
Are you shure that you've got a global version. I had nearly the same probs as I've flashed the global on my eu hardware.
Laptapper said:
Are you shure that you've got a global version. I had nearly the same probs as I've flashed the global on my eu hardware.
Click to expand...
Click to collapse
yes, the box says global ROM and the warranty as well and made in china. When i first buy it the box still sealed too but ididnt buy from the mi store.
ohookayy said:
yes, the box says global ROM and the warranty as well and made in china. When i first buy it the box still sealed too but ididnt buy from the mi store.
Click to expand...
Click to collapse
In my personal opinion there're 2 possibilities
Damaged hardware
Or
Modem Partition wrong or damaged
MODEM or RADIO - the phone's radio
Also called baseband, it is responsible for signals and on older devices may control wifi, bluetooth, and GPS (on most newer devices, these are handled by the kernel and ROM). Upgrades are country dependent and may improve or diminish battery performance, network signal strength, and roaming capability. It is also sometimes required to have a minimum Baseband version to use a ROM so that the RIL will play nice with the Baseband.
Modem firmware is a mini-OS for the cellular radio chip which has its own processor. Firmware is a general term, firmware exists for a lot of things on phone. The wireless chip for WiFi, GPS, and Bluetooth often has a firmware as can the GPU core among other things. These firmware files are usually located inside the SYSTEM or VENDOR partition. The modem firmware is special because it has its own separate Baseband Processor (BP) so the firmware is left out of the system image in its own partition.
Modem is not an Android-specific partition. It is tied to the hardware of the phone, but the kernel has a code allowing Android to interact with the hardware. But the baseband processor (BP) - which runs modem and is responsible for all communication through mobile networks e.g. call, SMS and internet - is totally isolated from Application Processor (the one we call CPU) and is not governed by Android kernel; it runs an independent RTOS.
May it helps you for getting a solution....
Laptapper said:
In my personal opinion there're 2 possibilities
Damaged hardware
Or
Modem Partition wrong or damaged
MODEM or RADIO - the phone's radio
Also called baseband, it is responsible for signals and on older devices may control wifi, bluetooth, and GPS (on most newer devices, these are handled by the kernel and ROM). Upgrades are country dependent and may improve or diminish battery performance, network signal strength, and roaming capability. It is also sometimes required to have a minimum Baseband version to use a ROM so that the RIL will play nice with the Baseband.
Modem firmware is a mini-OS for the cellular radio chip which has its own processor. Firmware is a general term, firmware exists for a lot of things on phone. The wireless chip for WiFi, GPS, and Bluetooth often has a firmware as can the GPU core among other things. These firmware files are usually located inside the SYSTEM or VENDOR partition. The modem firmware is special because it has its own separate Baseband Processor (BP) so the firmware is left out of the system image in its own partition.
Modem is not an Android-specific partition. It is tied to the hardware of the phone, but the kernel has a code allowing Android to interact with the hardware. But the baseband processor (BP) - which runs modem and is responsible for all communication through mobile networks e.g. call, SMS and internet - is totally isolated from Application Processor (the one we call CPU) and is not governed by Android kernel; it runs an independent RTOS.
May it helps you for getting a solution....
Click to expand...
Click to collapse
Thanks for the long and detailed explanation . My mobile network & GPS still work properly without any issues.
but idk if the Bluetooth & WiFi chip maybe fried inside
Maybe i just dont have any other option except to fix in mi store.
Once again thanks for the help :fingers-crossed:.

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