Null IMEI/Baseband - Galaxy S6 Q&A, Help & Troubleshooting

Hey guys, so I'm pretty new to all this, I wanted to root my Galaxy S6 - SM-G920F - to be able to play pokemon from home... yes, that sad. So I started reading XDA like my brother recommended and "learnt" how to root my phone. In the beggining when i was installing SuperSU I had some problems and my phone went into bootloop, but it was because of my cable, I then reflashed it with another cable and it fixed the bootloop issue. I went on to install TWRP and that's when mistakes started happening. First of all, I forgot to back up my phone, including the EFS which, after reading countless posts, I understood is what gives the phone the IMEI code.
I tried installing the standard Xposed on Galaxy S6 (only later on i learnt you must use Wanam on samsungs from S6 and above) and my phone went into bootloop, with out knowing what to do (i tried the uninstall zip but it was failing to install from twrp...), very stupidly, i deleted my System folder... After much more reading, i tried using KIES3 and Smart switch to recover, but they always ask for the stupid recovery code,which I don't have, when i tried the upgrade and initialization option... I tried costum roms and a ****load of stuff. Custom Roms would usually work, my phone would turn on and that's when i noticed my SIM wasn't beeing recognized. (later on i also found out i didn't have IMEI) tried flashing the appropriate MODEM for my galaxy but it all failed. I don't remenber all the stuff I did tbh... I tried the tyrannus ROM and XtreStoLite Universal Deodexed Mod Edition ROM, and tried flashing the MODEM that comes with the last mentioned ROM and yeah, probably just useless attempts that wouldn't fix the problem in the first place. Then i tried flashing Stock, from Sammobile: I bought my phone at the Portuguese vodafone, so G920FXXS3DPF5_G920FVFG3DPC1_TCL (marshmallow) with Odin but it would always fail. Then i read something about splitting the folder in 5 and flashing 1 by 1 and it would work until the Hidden zip, which would always fail. I tried not flashing Hidden and my phone turned on and I went back to stock although, still with out IMEI or baseband. Then after more reading, i found out the best solution would be giving it to a store.
So i just rooted, twrp and did what i wanted to do in the first place. With the correct Wanam Xposed this time (later on i found a way to hack pokemon with out root... sucks :v) and i managed this time.
Yesterday i went to the stored and today the guy told me to go get it, with high hopes i went there, to find out he couldn't fix the problem... He tried Octobox to rewrite the IMEI from the one in the back of phone, but he says it failed. So now I really don't know what to do. The guy went on holidays and told me to go back there when he comes back, we wants to try to downgrade to lollipop and try to fix it from there (he said he has more tools available to work with). It could work, Galaxy S6 just got marshmallow 1/2 months ago officially, and i bought the phone in october of last year, so maybe with the ROM it came with, I really don't know.
At this point I'm just looking for suggestions. I'll be paying attention to the forum and try to reply to all the questions you might have to my best. Thank you all for your time and patience!
:EDIT: so... another major mistake i guess, I found out today, by asking my parents where they got the phone, that the phone wasn't actually purchased in vodafone, the phone was bought in a Samsung store, so it is unblocked. So most likely I've been flashing the wrong stock rom all along. Could you guys guide me in the right direction from here?

What would be the appropriate ROM for the unblocked? vodafone portugal is TCL, optimus is OPT and MEO is MEO. There is another one under the name TPH, would that be the appropriate one?

Solved
Okay... using the correct stock rom fixed all my problems... sorry for wasting your time guys! TPH was the right one

Where did you find your roms?

Related

[Completed] Formatting Samsung S3 Problem

Hey, so basically I'm in a situation where I have no idea what to do.
I recently just got a new phone, and am going to give my Samsung Galaxy S3, SGH-T999V model - from Wind Mobile to my Dad. Basically, when I first got the phone - a couple months after, I decided to try Rooting it, and I did, successfully. Since I didn't really know what to do with my rooted phone, I decided to unroot it - then tried rooting it again some months later, but it didn't work successfully. Basically my phone wasn't rooted, but I had the "Team-Win" recovery on it.
I wanted to bring my phone back to it's original state - and have the stock recovery on it. After some Googling, my solution seemed to be to flash the stock rom for the SGH-T999V model onto my phone using Odin. And I did that - and it worked successfully. But I still couldn't check for OTA updates or anything, it said my phone had still been modified in an unauthorized way.
Now that I need to give the phone to my Dad, I have to format the device and erase everything. This is where my problem starts. When I try to format it (using the Stock recovery), I see a bunch of error messages, with the Android logo falling down in a kind of dead way. I reboot my device, and nothing changes.
It still has all my data, and everything on it.
Sorry if this is the wrong area to post this (I'm relatively new to the forum), and if my problem doesn't make much sense - I've tried being as detailed as possible. Could anyone help?
Hi, thank you for using XDA Assist. Flashing the stock firmware should show you to get ota's. This should have everything you need,http://forum.xda-developers.com/galaxy-s3/general/samsung-galaxy-s3-sticky-roll-thread-t2344125. Also, you can ask further questions here,http://forum.xda-developers.com/galaxy-s3/help/help-thread-galaxy-s3-question-t2690307
Thread closed

[Q] Huge Problem (Build.Prop/Bootloop/Cant Flash)

Hi everyone,
Right I have a serious issue with a 4 day old S6 from the UK bought SIM-Free off Amazon.
My phone was rooted but didn't have ADB or any sort of custom recovery. I edited the build.prop file for the RAM management thing, and created a copy back up on my storage. I didn't like it too much, so I copied the back up over the edited one and restarted - phone went into boot loop.
I have attempted to use Odin and flash a stock firmware ROM (had to settle for a H3G variation because the XEU unbranded was off some download website that takes 10 hours to download). I went through all the steps with Qbking77's walkthrough with Odin and it came up that it failed at the end.
The phone then booted into the Emergency Recovery screen, and couldn't get back into Recovery (to do the Smart Switch recovery), and can only get back into the Download bit.
I've tried flashing it again, and no avail.
I seriously, seriously hope someone can help me out here, it's a brand new phone and I love it and I don't want to be left with a brick.
Thanks.
I was in the same boat, if you rooted and didn't trip Know, your best bet is the Samsung Store, they're all over the UK
Well an update:
After the third time flashing failed, I did a root via Odin which had previously failed, and it booted up, completely normal and set up the device as normal.
I have no idea how that worked - but it did. Probably tripped the Knox I think but it works.

[Completed] LG G2 Boots into TWRP Every Time I try to boot after Update

Alright, so before I say anything, I have not visited this site nor have I conducted any business with roms, TWRP, etc in the past year let's say. I used to be an avid visitor, flashing a bunch of roms, but was tired of the amounts of bugs and problems that I found. So I restored my back to stock on my G2 from TWRP. Been using it for about 1 year now, just so I didn't have to deal with problems... until now.
So a few days ago I saw an update in my notifications, but for the love of God I cannot remember what it said. All I know was that it needed to update something about the phone, not for example an app. Today I decided just to update it, and suddenly the phone rebooted into TWRP. I thought that was weird so I rebooted it again, and back into TWRP I was. I tried restoring some old backups to see if they would maybe boot into it, but once again it keeps bringing me to TWRP. Now I am stuck in a position where I am unable to use my phone and am not sure what to do next. I haven't visited these forums in a while either so Im not sure where to post this xD.
Honestly if someone can suggest something or help me in any way, it is appreciated. If there is anything I can do to help, just say the word.
I am using the Canadian Variant of the LG G2, from wind. I believe it is a D801 but not an actual D801, as I remember being told to only flash D803 roms as it was basically a D803. Not sure if that helps. Im planning on getting a new phone so I just need this one to hang on a little bit longer.
Thread closed / Duplicate

GT-I9100 Nand r/w corruption suspected

Hello people of XDA!
I know that this thread may be repetitive, but I unfortunately didn't find any help in all threads regarding GSII's NAND r/w problem.
So in short, I will explain what happened to this device
I bought this GSII brand new as my 1st flagship device, and I am kind of sentimentally connected to it, if not I would've thrown it in trash a long time ago.
So here is the thing
I had stock firmware on this device (4.1.2 JB) , and after some time decided to flash CM 11 on it when it came out, and had it on my phone for 4-5 weeks but I instantly noticed that my device was overheating with that ROM so I decided to get back on stock firmware, unfortunately thing is that i flashed android 4.0.3 ICS (Movistar Mexico) then my device got bricked (I had a really bad knowledge back then about roms and things that I SHOULD and SHOULDN'Tdo), anyway I tried fixing the mess I made by flashing my original android 4.1.2 JB rom (Telenor Serbia) hoping that will solve my bricked device, but unsuccessfully. Then I tried flashing again standardly for maybe 4-5 times with no success and decided to explore more functions that odin provides, so I checked NAND erase all last time I flashed and I guess made a huge mistake, but still I couldn't boot my device, I tried hard resetting it (I lost my power button while replacing the screen of my phone, so I couldn't boot into recovery to check if device is soft bricked or really hard bricked, but download mode works just fine). Still I tried, I flashed custom kernels hoping they would fix this brick but nothing happened, I would really like to get this thing working again, I had no success at finding a good mainboard to replace the old one, and doing it in official repair shops and non-official ones costs more than the phone itself. Sorry for asking the same old question I guess but I would be really thankful if I could get this working again!

Need help with my S6!

Hello there,
Please forgive me if i posted this thread on the wrong place.
-I would've not posted a thread here unless this got serious, so i own a Samsung Galaxy S6, it's 1 year old phone, when i first got it, i used it normally like everyone else and had no problem with it, but my curiosity got me to root the phone, i still did not get any problem with it until i chose to add a ROM. I used NNE 5.1 S8 port and it was working well until it got my phone broken somehow.
-My phone started acting really strange after 2 months of activity of that new ROM, my phone just started restarting randomly and it got me worried, i thought it's an application problem so i first just factory reset it. It seemed it was not the problem on an application, so i chose to change my firmware to a stock one. I searched up recently on the newest firmware for S6 and i found out it's: XEF (France) , PDA (AP): G920FXXU6ERC1 and CSC : G920FOXA6ERC1 on 2018-03-22. I Downloaded 4 files: BL,AP,CP,CSC , and i found out about PIT on one of the posts in this forum (Filename: SM-G920F-ZEROFLTE_EUR_OPEN.pit).
-Before i flashed with Odin, i wiped System, Data, Cache and Dalvrik Cache. The firmware worked well but after 1 hour it started doing the same thing but now differently. It happend to me only 1 time that it froze up on an application, but i think that is just an app problem. The main problem is that when i lock my screen, i cannot unlock it anymore, it just freezes there until it restarts after a short period of time. After the restart, it just keeps going, restarts, asks for pin, restarts and so on.
I tried removing the sim card and putting it back in, did not work.
I tried Safe mode, still same.
Model of phone: SM-G920F
Current firmware: XEF (G920FXXU6ERC1)
Android version: Nougat (7.0)
If you can help me, or you know something about this problem, please repost here, i would be really grateful since this is my only phone
Ininstall twrp backup everything most important efs partition.
Install samsung switch and pray that it asks you to do an update. If not try to flash a diferent version of nougat for example November security patch and try again with samsung switch
lenovot said:
Ininstall twrp backup everything most important efs partition.
Install samsung switch and pray that it asks you to do an update. If not try to flash a diferent version of nougat for example November security patch and try again with samsung switch
Click to expand...
Click to collapse
How could samsung switch possibly help?
I did flash it with different versions already, but no luck :/.
I've been praying a lot for this lately but it is not working lol
Please Bump this!
try doing this.
1) go here: https://updato.com/
2) choose download 2 roms. 1 nougat and another marshmallow (to my knowledge, stock roms are one file. no more splits and unless otherwise stated... no need for pit)
3) first flash nougat using oden
4) try the phone for a few some time.
if after a set amount of time, phone works fancy and no issues present then it's solved.
if not... install marshmallow. then try again.
if all this fails then...
install nougat. as soon as possible afterwards install twrp.
boot into twrp and just leave it there. my twrp locks after a while and screen goes dark until user interaction (just like it's supposed to)
if the same thing happens then its a hardware issue... probably... (i have had my main board fail... kinda similar not similar issue... hope you dont have the same issue and that its just software related)
good luck.
In my case every time there was an update available it would download the whole firmware and by doing so you would get the most fresh and updated version. Also it updates every partition to match

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