Why can i use mobile data even though it says unknown imei? - Redmi 9C Questions & Answers

Hi, i installed stock rom (i also once installed custom rom but didnt work) and now it says unknown imei, but i can still use mobile data without problem at all. But how could you use mobile data even though it says unknown imei? Thanks

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Network Error after 2.1 unbranded flashed

Hi all, well, here is my problem.
I have my stock rom 2.1 eclair from Personal, Argentina, and i flash the phone to put the 2.1 ARO (Unbranded). After the flash, the phone works great for a while, then i lost connection, and i coulnt connect to my network anymore. I couldnt performs calls, sms, or whatever related with communication. I only have wifi.
If i access to Mobile Networks -> Net Operators, the phone keeps searching and never retrieve the list of network operators. My apn list is empty, and i couldnt add new ones, mannually or by APN Restore & Backup software. The network mode is not selected, but if i choose one mode, it doesnt selected it.
I Flashed the phone with Odin, with and without repartition, but it still having errors.
Any one can help me?
Factory reset first .
jje
i've performed a factory reste, but nothing happends...
try to deactivate the mobile data and restarting the phone this worked once for me, if that doesnt work i would suggest trying another rom this also worked once for me. And if all else fails then your gonna have to send it back for repair, i had to do that last time this happened. I put on the 2.2 update from my carrier and told them that the phone messed up after updating.
The endless searching for a carrier is normal, but you should be able to enter apns manually. Search for the code to check IMEI and confirm you have one listed.
If you have a backup of your efs file, you can restore that and see if it solves the problem, or load an Argentinian csc file (they may have one in the ROM Kitchen that you can cook as an update.zip) .
Sent from my GT-I9000 using XDA Premium App

[Q] Mobile network not available..?

Hello, I bought of a friend a Samsung galaxy s and he said it needs only unlocking,so i "think" i unlocked it successfully.Was putting a O2 Simcard in and in applications i was having then the o2 SIM Toolkit.
But when i tried to make an phonecall, he tells me "Mobile Network not available",so i went to settings and wireless and network and tried to choose an network operator but he tells me then " Unable to connect to this network at this time.Please try again later."
What can I do?
Did you check the APNs?
Please first check if your IMEI is intact. If it is, flash a different MODEM and see if it works. If it's not, flash a fresh ROM using ODIN and that should hopefully restore your efs.
At first thanks for the reply, but now what is a APN? And how do i know if my IMEI is intact?
Sry,am a newbie
For you IMEI you should check your original SGS Box's sticker. There should be you IMEI number printed on. If you dial *#06# you should be able to read your IMEI. --> Look if it is the same as on your box
for apn settings. Apn is your connection settings, how your phone connects with the providers network. you have to check your mobile network settings if these are correct.
So, the IMEI nr is different then on the sticker,and the apn wasnt ticked,so I ticked the O2 and tried but still no mobile network.
Then i need to flash if I'm right?
I was already looking a bit around here about roms etc. But there are quite a few out there,so when you say to flash a fresh rom,which actually do I need to use?
Thank you
Hi again,
because the imei wasn't the same, I flashed it with a new rom (actually two different ones)
But still after both flashes I still don't got my old imei and still no mobile network available. After the one flash with I9000XXJPU he didn't said anymore no mobile network available,instead he said no data network available.
It would be nice if somebody would have some advice or help.
Thanks
hey! don't panic, i have had the the same problem
just download darky's resurrection edition in the development section and flash it. it should bring you back to froyo 2.2.1 and should also restore your imei properly. after this procedure you are free to flash any rom you want
dasickzz said:
Hi again,
because the imei wasn't the same, I flashed it with a new rom (actually two different ones)
But still after both flashes I still don't got my old imei and still no mobile network available. After the one flash with I9000XXJPU he didn't said anymore no mobile network available,instead he said no data network available.
It would be nice if somebody would have some advice or help.
Thanks
Click to expand...
Click to collapse
Flash back to 2.2.1
Check imei
Continue on..
Also the problem you had when flashed JPU sounds like you didnt have your APNs correct..thats why the "no data network available"
Sent from my GT-I9000 using Tapatalk
For apn settings check your provider website, our phone them and they will help you set it up
Insanity cm 014/glitch
Hey, I'm having exactly the same problem although the imei number for me is correct.... What can I do?? I googled this problem for hours and without any solution found.... Thanks for any help out here!
Sorry I don't mean to spam but I really need help with this! Thanks
hey, check this, seems to be solved
http://forum.gsmhosting.com/vbb/f453/samsung-i9000-after-unlock-no-network-1168675/
automatic search network...n pjt phone on Utomode for selectkon network
Sent from my GT-I9000 using XDA App
No Network
Hi!
I have the same problem.
Network is fine (i switched the SIM-Card into different phones), but my SGS GT I-9000 does not connect / find to any network.
I am running Darky`s ROM 4.0.4 v11.0 Black Edition with 3.0.17-Semaphore_ICS_1.2.5s.
Also, the phone says on screen the name of my network provider (COSMOTE), but no signal.
What now?

[Q] IMEI unknown and no signal

Hey guys i have a problem.
I bought an LTE on T-mobile off ebay with a damaged digitizer. when i went to pick it up, the guy had his sim in and proved it accepted calls etc.
i got a new screen and did a factory restore. the new screen had a frame attached and i threw the old one away losing the IMEI number.
I get a t-mobile sim and activated it. i put it in the phone but it wouldnt pick up a signal at all.
it wouldnt detect a sim, even when i put in a sim from another network.
i checked settings and i says:
mobile network type: unknown
Service state: out of service
Mobile network state: disconnected
My phone number: unknown
ERI version: not avaliable
IMEI: unknown
i read online to try flashing a new ROM so i gave that a go but it didnt change anything.
i also read to check antenna connection but it connected ok and no damage on connectors.
does anyone have any idea what could be causing it and how i can solve it?
Flash Perseus Kernel and check that again
Sent from my GT-I9305 using xda premium
jjpro45 said:
Flash Perseus Kernel and check that again
Sent from my GT-I9305 using xda premium
Click to expand...
Click to collapse
ok will do that in a little while and will post results thankyou
it wont install it via sd-card. says signature verification fail.
will try it through odin now
odin wont recognise the file to flash it.
i downloaded the .tar zip file. any idea why it might not work?
Restore the IMEi backed up
http://forum.xda-developers.com/showthread.php?t=1946915
no backup then you need a service centre .
jje

i9305 no mobile signal..what else can i try ?

I Have had this i9305 now without mobile signal, with a vodaphone it did used to show signal but in all cases it always says 'no mobile networks' or 'not registered on network' i have tried with every sim i can think of... it was suggested to flash a stock rom which i did..this made no difference, i then tried installing CM11 and followed the guide to the letter.
I know this phone is not blacklisted as i checked with the imei, i have tried flashing different modems but to be honest im not sure what i am flashing to it..i have tried three different ones now starting with XX as i am in uk...i really dont know if i have missed something or doing something drastically wrong..i have read and read and usualy i would have had this resolved by now...can anyone please help me as i want to give this handset to my girlfriend for a present very soon so we can keep in touch..i am at my wits end with it:crying:
Thanks
Try an emergency restore through Samsung Kies - this should eliminate any software related problem. Sounds to be a hardware problem though so get Triangleaway going and send it for repair if that doesn't work.
Flash 4.1.2, then enable and disable the LTE-only mode hack in the hidden service menu (the *#2263# one, not *#*#4636#*#*). (If you have root, you can also access that menu in 4.3 or even the 4.4.2 port, but it's a bit more involved.)
Sent from my GT-I9305 using XDA Free mobile app
Magik_Breezy said:
Try an emergency restore through Samsung Kies - this should eliminate any software related problem. Sounds to be a hardware problem though so get Triangleaway going and send it for repair if that doesn't work.
Click to expand...
Click to collapse
it won't let me do that as it doesn't list the phone as needing an emergency recovery. I flashed a stock rom and the signal is showing but it keeps saying not registered on network.. if I do a search it finds providers but when I opt for the provider of the sim it just perpetually spins at registering on network.
.NetRolller 3D said:
Flash 4.1.2, then enable and disable the LTE-only mode hack in the hidden service menu (the *#2263# one, not *#*#4636#*#*). (If you have root, you can also access that menu in 4.3 or even the 4.4.2 port, but it's a bit more involved.)
Sent from my GT-I9305 using XDA Free mobile app
Click to expand...
Click to collapse
when you say 4.1.2 which rom.. A stock one or a custom.. could you point me please ?.. The stock rom I have flashed is 4.1.3 I didn't flash a radio after as being stock it would be there already ??
Have just followed a guide to root this unit, upon installing root checker it says this device does not have proper root, Odin reports that everything went ok and i get the red pirate android..when the phone boots a pop up comes up saying unfortunatley SU has stopped working... not sure whether KNOX is stopping this ?
no network.
Hellow to you all.
I have got a problem in my s3 LTE.
After installed several rooms my lte not register in WCDMA network.
The mobile phone was from a french network. Bouygues and was unlocked in portugal.
i have got many problems with this phone but i like it very mutch.
the problem that bothers me the most is that i only make and receive calls with full network.
The WCDMA was not working but i allready fix it. Now when i turn to wcdma only it says not register in networck.
the only backup i have from the EFS folder was made by copy- paste and i think the problem was allready there and now i think i had brocken my phone. can you help me???
Excuse my englisb.
967571918 said:
Hellow to you all.
I have got a problem in my s3 LTE.
After installed several rooms my lte not register in WCDMA network.
The mobile phone was from a french network. Bouygues and was unlocked in portugal.
i have got many problems with this phone but i like it very mutch.
the problem that bothers me the most is that i only make and receive calls with full network.
The WCDMA was not working but i allready fix it. Now when i turn to wcdma only it says not register in networck.
the only backup i have from the EFS folder was made by copy- paste and i think the problem was allready there and now i think i had brocken my phone. can you help me???
Excuse my englisb.
Click to expand...
Click to collapse
please start your own thread as it is not relevant to mine.
Someone's suggested this phone is barred.. I have run a check which says it's not blocked but it's been suggested that this is unreliable...I have bars showing but just never registered on network.
Does your IMEI reported in *#06# match the one printed under the battery?
Sent from my GT-I9305 using XDA Free mobile app
hey loady,
did you manage to solve theproblem? i have the same problem since roughly 3 weeks. but honestly, i didnt put much effort in fixing it.
i found a big thread a while ago where the problem is solved... i'll look for it

IMEI unknown after flashing custom rom

I flashed Android 12 custom rom which messed up my baseband and now IMEI is shown unknown (wifi, Bluetooth, mobile network not working)
So i rolled back to my previous stable rom -
PixelExperience_Plus_rosy-11.0-20210313-0535-OFFICIAL.
But still no network, wifi and Bluetooth.
Please help me.
I tried one way as below but not sure if it is correct -
I tried a qcn file downloaded from some site and updated with my original IMEI and tried to restore it using QPST (QPST detects the phone successfully) but it gives some error (phone sent invalid reply)
Please help me with the easiest option.
vvstorm2 said:
I flashed Android 12 custom rom which messed up my baseband and now IMEI is shown unknown (wifi, Bluetooth, mobile network not working)
So i rolled back to my previous stable rom -
PixelExperience_Plus_rosy-11.0-20210313-0535-OFFICIAL.
But still no network, wifi and Bluetooth.
Please help me.
I tried one way as below but not sure if it is correct -
I tried a qcn file downloaded from some site and updated with my original IMEI and tried to restore it using QPST (QPST detects the phone successfully) but it gives some error (phone sent invalid reply)
Please help me with the easiest option.
Click to expand...
Click to collapse
check with this one
XIAOMI MI5 REPAIR IMEI WITHOUT ROOT-WITHOUT Unlock bootloader - GSM-Forum
imei repair succesfully completed without unlock bootloader within 70 hours and without twrp-root..no headache.no waste of time...just 3 minutes
forum.gsmhosting.com

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