Should I change the firmware? - Samsung Galaxy M20 Questions & Answers

I'm going to reset the phone to factory settings, because it has been working for a year now. How good is the standard, official firmware? Should I change to another official?
The fact is that I have installed Ukrainian firmware M205FNXXU3CTA2, when there is already M205FNXXU3CTA3...

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[Q] Froyo

ok so my question is this,
my SGS is unlocked and none network branded, it has no connection to any network, the only thing that defines the network to use is the sim card (O2 UK), yet for some reason evewn thought i have the latest version of kies, i still cannot upgrade to froyo, it keeps telling my phone has the latest version.
as my phone is not assigned to any specfic network why do i have to wait longer then most networks as surely an unlocked/unbranded phone shold ge teh update sooner as ther eis leess work to do to make it branded ? ? ?
Well even those unlocked ones from places like carphone warehouse have their own product code, all depends on when those places decide to get their firmware out.
Just use the KIES patching tool and choose XEU for the generic unbranded version of Froyo.
tried that and got the scandenavian version that was buggy as hell, it actually made the phone worse.
XEE is the Scandinavian version (JPA), with XEU you should get the generic European version (JPO).
You can check with *#1234#.
Failing that you can wait till CPW release their version.
EDIT; forgot to ask, what kind of buggy was it? Did you try a factory restore? I find that its often best to do that, but obviously doing so will erase phone data.
where to start,
gps was worse,
laggy as hell,
flash would not work,
sync was messed up in both gmail and facebook,
cam took ages to run
and thats only wwhat i can remember, i did a complete wipe before and after, cleared all cache and factory data via 3BR, and it still was a mess. i had to roll back to JM1 as it was that bad, only thing i did like was the coloured icons in the settings menu, besides that it was a complete waste of time (im refering to the XEE version).
im running the new version of kies now so i dont think the reg hack wors does it, if so hows it done again i forgot, not worried about loosing my data i have all contacts and txt storred on my laptop.
Kies Registry Patcher 1.6.0.0, patch registry on latest Kies
I used that, managed to flash JPO (XEU), JPA (XEE) and JP5 (O2U).
thanks ill give it a go, what more of a mess can i make than already exists right,
Edit: thanksbd, downloading JPO now, well sei this is any betterthan the XEE version.

[Q] Re-stock to original firmware (NO)

Just bought a Galaxy Tab from a coworker whom had already rooted and installed a custom firmware (Overcome). However, I want to re-stock it to its original state but I´m having trouble finding the correct firmware for my region Norway (Nordic).
I have tried the re-stock option that Overcome has described but this stock rom does not include Norwegian as a language. Can anybody please help me?
Vegard
Hi, I'm actually having the same problem. And especially now when I've bought the nordic keyboard dock too, that doesn't work unless I have the original firmware. Anyone have any suggestions? Really need help, been working all day to fix this...still no luck
I'm giving it a try by spoofing FW with SpoofFW from market (but i got into trouble with the backup part of it)
discussed here:
http://forum.xda-developers.com/showthread.php?t=959806
Now running stock gingerbread NEE firmware on my tab - weird thing though is that most of my old apps and accounts still work?
I'm not sure if I should do a factory reset or not, ppl seems to have had problems with it...
Had the same issue with not being able to get Danish samsung keyboard again after flashing custom rom. Some people even said, it was not possible to download a nordic rom.
Using the web version of Check Fus I was able to dowload a Nordic rom by selecting Sweden, and after installing it with Odin and the mr. pit file from samfirmware I finally managed to get a Nordic firmware with Danish keyboard working with the keyboard dock.
http://fus.nanzen.se/

[Q] Problem with settings on stock

Hi ,
Currently i'm using the stock rom from vodafone portugal, when i go to settings and chose restore defaults after rebooting i loose some settings like voicemail number and such.
I analised the csc file and it contains those settings.
Any idea how to fix this, i already reflashed the phone but after reseting it does the same thing.
calbertoferreira said:
Hi ,
Currently i'm using the stock rom from vodafone portugal, when i go to settings and chose restore defaults after rebooting i loose some settings like voicemail number and such.
I analised the csc file and it contains those settings.
Any idea how to fix this, i already reflashed the phone but after reseting it does the same thing.
Click to expand...
Click to collapse
Sometimes doing a factory restore on you phone ****s the rom. This has happend to me once I tried to sell my phone and restore it, I had to flash a new rom and I never worried about going back to stock Portugal TMN rom I orignally had.
By the way, I remember my froyo rom from TMN Portugal had a great stock ringtone which I loved, can you tell me what is the default ringtone from your rom? XD

[Q] No call sound after back to stock

Hi guys,
I know there are many similiar threads to this one and I'm sure I've read most of them. Either my issue is different, or, if the answer was in one of them, I was too stupid to realize it.
With my S4 Active GT-I9295 I had to go back to stock ROM for the Samsung S-Health and Gear related apps.
I came from spegelius' (absolutely awesome) Google Edition for SGS4A (int'l) v0.9.9.-od2 and flashed the Samsung Stock 4.4.2 with Odin (*). The procedure was: Flash -> Factory Reset -> Flash again to be absolutely sure all files are updated. Currently, I rooted the phone.
My problem persists:
After a reboot I (usually; not always) am able to make normal phone calls.
After some time (sometimes minutes, sometimes hours) I no longer have sound.
I do not hear ringing, the callee can't hear me, I can't hear the callee.
Same problem if I'm being called
Establishing a connection though works always.
Mobile Data is not affected.
WiFi works
Also observed after factory reset -> re-flash, only enter WiFi PW and Google Login Data -> try phone call
I know this problem often arises from a baseband/modem mismatch. So I investigated my CWM backup of the pre-installed 4.2.2 ROM.
That's what was pre-installed:
Bootloader: I9295XXUBMK3
CSC: I9295OXXBMK3
Modem: *I did not find the info in my backup*
This corresponds to the Romanian 4.2.2: http://www.sammobile.com/firmwares/download/22586/I9295XXUBMK3_I9295OXXBMK3_ROM.zip/
That's why I flashed the direct successor http://www.sammobile.com/firmwares/download/37083/I9295XXUCNI1_I9295OXXCNI1_ROM.zip/
PDA: I9295XXUCNI1
CSC: I9295OXXCNI1
MODEM: I9295XXUCNI1
I tried everything I could find online, nothing helped. I am really running out of ideas. Is it possible to go back to 4.2.2 to see if the problem persists?
I do have logcat logs of the radio module before and after the problem occured. But its thousands of lines. If it helps I can upload it!
Thank you guys for your help
(*): I did some intermediate flashing of several other firmware versions (especially different baseband / CSC versions of the same 4.4.2). But I assume this does not affect the result. I used Odin v3.07 & v3.09
Edit: PS: I still think that I might have the wrong CSC Version. I know the 4.2.2 PDA/CSC matches, but I am not from Romania. I'm actually from Germany. And what makes me wonder is that I cannot select the German Keyboard Style without downloading it first. I can't remember doing something similar after unboxing the phone and setting it up for the first time.
Are you aware of this thread?
http://forum.xda-developers.com/showthread.php?p=56955843
Bevare the Thanks Button
Thanks for the answer O-T!
Yes, I was aware of that thread. However, I never made it until here
http://forum.xda-developers.com/showthread.php?p=50787570
Although I did the things basically as described in that posts I have a new question:
Which country is relevant for the search on sammobile? I mean, do they ask me "Where do you live" or "For which country was your device produced?".
Edit: Okay actually they ask me for the 'product code', so it's probably the latter question.
I realized that my 4.2.2 PDA and CSC also match the French version. That would match the language of my original packaging. I already flashed the French 4.4.2 once but heard only noise when calling someone. So I gave up on that one quickly. But I'll give it another shot now.
Is it possible that I had a factory installation of the firmware for country A, and when I first registered with my local carrier I received a modem update OTA for country B?
That would really surprise me. But it could explain my issues, since there is no 4.4.2 for o2 Germany, i.e. I probably wouldn't receive another modem update OTA.
(I never looked into the carrier specific firmwares because I figured they are for sim-locked devices.)
If the above is true, I understand that the only option would be to somehow downgrade my device back to 4.2.2.
I know I'm asking a lot of questions that have been asked and answered elsewhere. But by now I tried so much and nothing worked that I'm really confused and need your guidance.
I know I type too much, so a short summary.
Everything I tried so far didn't help, the stock ROM from sammobile.com doesn't help, currently I'm on 4.4.2 XEF (France)
I'm 80% sure I have the firmware for the correct country
From factory-side I definitely had an XX PDA and OXX CSC, so shouldn't all XX/OXX versions work, even if not the exact country?
What should I try next?
Is there a way to uniquely identify the country code from a backup of the /system or /data parition?
hyperion89 said:
I know I type too much, so a short summary.
Everything I tried so far didn't help, the stock ROM from sammobile.com doesn't help, currently I'm on 4.4.2 XEF (France)
I'm 80% sure I have the firmware for the correct country
From factory-side I definitely had an XX PDA and OXX CSC, so shouldn't all XX/OXX versions work, even if not the exact country?
What should I try next?
Is there a way to uniquely identify the country code from a backup of the /system or /data parition?
Click to expand...
Click to collapse
I am not sure if you have done this, but one thing I always recommend is a phone factory reset from settings (not CWM/TWRP) when you are on stock firmware as this is known to correct a lot of issues caused mainly due to faulty partition / corruption. However beware of the fact that this will wipe your internal SD card therefore back it up before you do that.
If you have flashed the correct firmware for your country & carrier (if it has a separate one) where you are using the phone, and done the above then I do no see any other issue than a faulty IC that requires replacement
JASONRR said:
I am not sure if you have done this, but one thing I always recommend is a phone factory reset from settings (not CWM/TWRP) when you are on stock firmware as this is known to correct a lot of issues caused mainly due to faulty partition / corruption. However beware of the fact that this will wipe your internal SD card therefore back it up before you do that.
Click to expand...
Click to collapse
Yes, I always did a factory reset. Most of the times I even flashed the firmware a second time after the factory reset. (This was recommended somewhere else.)
JASONRR said:
If you have flashed the correct firmware for your country & carrier (if it has a separate one) where you are using the phone, and done the above then I do no see any other issue than a faulty IC that requires replacement
Click to expand...
Click to collapse
Now that really helps me! Thanks. BUT: There is a seperate firmware for my carrier. However, I did not purchase the phone from that carrier. That's why I never tested the carrier specific firmware. Moreover, there is only the old 4.2.2 available, so I can't test it, since I cannot downgrade.
hyperion89 said:
Now that really helps me! Thanks. BUT: There is a seperate firmware for my carrier. However, I did not purchase the phone from that carrier. That's why I never tested the carrier specific firmware. Moreover, there is only the old 4.2.2 available, so I can't test it, since I cannot downgrade.
Click to expand...
Click to collapse
You can flash only the modem & non-holos from the 4.2.2 firmware and check
JASONRR said:
You can flash only the modem & non-holos from the 4.2.2 firmware and check
Click to expand...
Click to collapse
Tried it and it didn't work; completely crashed my Phone Application. It rang on the other side, but no conversation was possible. Is this because of the bootloader / modem mismatch?
Does anyone have instructions to safely downgrade to 4.2.2 again? Should I open another thread for this discussion?
hyperion89 said:
Tried it and it didn't work; completely crashed my Phone Application. It rang on the other side, but no conversation was possible. Is this because of the bootloader / modem mismatch?
Does anyone have instructions to safely downgrade to 4.2.2 again? Should I open another thread for this discussion?
Click to expand...
Click to collapse
Identify the bootloader version and Knox state:
http://forum.xda-developers.com/showthread.php?p=57332718
Knox is not a counter - it's a like a fuse.
Hi O-T,
the bootloader is I9295XXUBMK3 and it does not yet have the warranty bit which I assume you mean by KNOX state.
Are there maybe any new ideas?
hyperion89 said:
Hi O-T,
the bootloader is I9295XXUBMK3 and it does not yet have the warranty bit which I assume you mean by KNOX state.
Are there maybe any new ideas?
Click to expand...
Click to collapse
There's 3 stock 4.2.2 TW ROM I9295XXUBMK3 to choose for flash by Odin. All have different Germany CSC (Carrier Specific Code) - Generic, O2, T-Mobile. PDA=MODEM=I9295XXUBMK3 for all of them. Not sure if O2 or T-Mobile versions are locked, but they usually have operators bloat apps.
Remember to power OFF before entering download mode, flash ROM in Odin, factory reset.
https://www.samdownloads.de/download/i9295xxubmk3-dbt-4-2-2-germany/
https://www.samdownloads.de/download/i9295xxubmk3-via-4-2-2-germany-o2/
https://www.samdownloads.de/download/i9295xxubmk3-dtm-4-2-2-germany-t-mobile/
Your choice.
O-T I'm so sorry. My post from yesterday was a lie; I can't read my own OP. :crying: :angel:
I9295XXUBMK3 was preinstalled
Now I'm on I9295XXUCNH2, which implies 4.4.2 and makes a downgrade to 4.2.2 impossible (afaik).
Please note that I already tried the generic German (4.4.2) firmware. I never had operater bloat apps and I bought a simlock-free version of the device. Thus I never tested the o2 / T-Mobile ones. (I did, however, once flash the o2 modem over the generic 4.4.2, which turned out to be a bad idea).
I would love to extract the modem info from my CWM backup. The bootloader / CSC strongly suggest I have a French phone, but the modem would ultimately clarify that.
What is your opinion on trying a different custom-ROM? I never built one so I have no idea from where designers obtain their NON-HLOS and modem files. I know many don't come with any of those and require an already working ROM before flashing so these drivers can be kept. On the other hand, Darkman's StockyROM has an additional modem pack.... which, in my case, didn't help.
I simply cannot believe that it's a hardware issue. Everything worked fine until the update to 4.4.2 and new radio drivers should be thoroughly tested before distribution.

How to know my region of my XP?

I did not try to unlock my bootloader. I only tried by getting the unlocking code from the Sony site but I did not continue.
My concern is, it is already been a month passed since the last OTA has been released and still I am not receiving notification automatically and manually.
One way to guess would be to first know what version of rom you have. For example .417 ending. So I went to xperifirm, checked for all the region updates. And only few of them had .417 as latest (5). so from there i had to guess which one was mine. Of course i had one other thing to help me which was, when i got the phone and started it first up, it showed language for the region that it originated from. I know it's not the proper way of knowing but it worked for me. You can also compare build.prop contents with your original rom and one downloaded from xperifirm, but for that you need to backup your own stock rom (downloaded from xperia companion, there are some guides)
Got it. Mine's from Hong Kong and I confirm there's still no official OTA for us
Settings > Support > search for Customization Numbers
Like 1234-3214-5368
And search for the same customization number in XperiFirm.exe.
There will be a matched one. This is your xperia phone's region.
Why is it that HK Xperias always gets the update last?

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