Hi guys,
I just got my phone back from service, it had a problem with the EFS partition (couldn't mount it, invalid argument). Until that, I had a NAND backup, and had the csc CNX, so I thought I should restore data from the nand (with CWM recovery 6.0.2.7). It all went ok, but when my phone rebooted, it couldn't connect to the network, the imei was ok, wifi ok. BTW, after the service, my csc was VD2.
So, the network wasn't working and I thought I should restore the efs folder. Still the same. Tried with restoring the efs partition and voila, now I'm at the beginning again (can't mount efs, invalid argument).
Before restoring from CWM, I tried flashing back my original stock FW with the csc CNX, but it wouldn't change, it remained VD2...
Any idea what could have happened?
jaszfalvi.tamas said:
Hi guys,
I just got my phone back from service, it had a problem with the EFS partition (couldn't mount it, invalid argument). Until that, I had a NAND backup, and had the csc CNX, so I thought I should restore data from the nand (with CWM recovery 6.0.2.7). It all went ok, but when my phone rebooted, it couldn't connect to the network, the imei was ok, wifi ok. BTW, after the service, my csc was VD2.
So, the network wasn't working and I thought I should restore the efs folder. Still the same. Tried with restoring the efs partition and voila, now I'm at the beginning again (can't mount efs, invalid argument).
Before restoring from CWM, I tried flashing back my original stock FW with the csc CNX, but it wouldn't change, it remained VD2...
Any idea what could have happened?
Click to expand...
Click to collapse
Network no modem did you flash a modem did you read how to change CSC .
You need a service centre ask them to do it all .
jje
Hm, so the network wasn't working because of the wrong CSC? Strange, it was working before the restore... No, I did not flash the modem, I only tried restoring the EFS, but I think you deserve a thanks
Related
guys i have a problem with my phone i was working on it and unexpected it restarted and its stuck on Samsung Logo i entered recovery to see whats wrong i wiped data and cache and i got this error
http://img809.imageshack.us/img809/4651/photookc.jpg
phone is full unlocked and o i didnt do anything to it
and then i flashed with odin latest android 4.1.2 and still get that same error is there anything i can do JTAG box or something to fix
thanks and sorry for my bad english
im waiting for an answer im without phone now help
Can you manually mount the efs partition in recovery or access it from within the Rom?
If not then your efs partition might be corrupt, format and restore your efs backup.
Hello,
I'm a rather experienced Android user. Before I flashed my S3 for the first time, I made sure to back up my EFS. After about a year and a flash of the newest ArchiDroid version, I couldn't get any signal all of a sudden. It worked the days before, and I flashed nothing new or installed anything. I read online about what that might have caused, and it seems like the problem of a lost EFS partition was the problem. I restored my EFS, rebooted, and the phone won't turn on now. It is stuck on the flashing "SAMSUNG" logo on start-up. Thinking I did something, I tried to boot into Clockwork recovery, but it only shows the ClockworkMod logo for about a second, then it reboots again. What should I do?
Try flashing a full stock firmware with Odin, but sudden failure could be nand wear.
Thanks for the reply, I flashed stock firmware with Odin. No errors, but I'm still stuck at the flashing "SAMSUNG" logo.
Boot into recovery and factory reset.
Alright, got into recovery.
Got an error: "E:Failed to mount /efs". How do I restore my EFS with my efs.img now?
EDIT: Managed to get my phone back to work, However, still no signal. Mobile data and phoning does not work.
Format the efs partition then restore your backup, check the permissions then factory reset again.
Edit. If your efs backup was really old, ie. efs v1, then you might have to flash a firmware from before EMG4 to get the efs read, then update to 4.3.
My phone was dead due to unknown reason. It was very slow for last couple of days, so I reboot the phone into recovery and then wipe cache and dalvik. After the wipe I reboot the phone but it stuck on Samsung logo. So I tried different unsuccessful methods like, flash stock ROM, etc...
After flashing the stock ROM, rebooted the phone into recovery for factory reset, then only I noticed the error E:failed to mount /efs (Invalid argument).
ApexArizona said:
My phone was dead due to unknown reason. It was very slow for last couple of days, so I reboot the phone into recovery and then wipe cache and dalvik. After the wipe I reboot the phone but it stuck on Samsung logo. So I tried different unsuccessful methods like, flash stock ROM, etc...
After flashing the stock ROM, rebooted the phone into recovery for factory reset, then only I noticed the error E:failed to mount /efs (Invalid argument).
Click to expand...
Click to collapse
I had this exact same problem all week.
There are a few steps you need to take before you can get your phone back to normal.
Step 1. DO NOT wipe the efs. Doing so will wipe your IMEI and serial number therefore never letting your phone connect to a cellular network again.
Step 2. Flash TWRP with ODIN and backup your efs using TWRP (make sure to keep this backup on your PC)
Step 3. Get the zerolte PIT file and the BTU stock ROM (Flashing my original stock rom didnt fix the issue so I used BTU and it fixed it)
Step 4. Flash the PIT file using ODIN and wait for your phone to restart. Then enter download mode again and flash the BTU stock rom
Step 5. Go back into ODIN and flash TWRP again, then make a backup of your efs again.
Step 6. Plug your device back into your PC and put your backed up efs from step 2 into the new backup and overwrite the files
Step 7. Restore the backup in TWRP and restart your phone
If your phone boots wait a little while and the carrier selection menu may show up. At this point you can leave your phone on that ROM and wait for Samsungs updates.
Common asked questions:
My phone fails at sboot.bin. You either havent flashed the PIT file or your phones bootloader has been updated to a newer bootloader. Try flashing just the modem.bin file from the tar file and seeing if that fixes your issue.
I've wiped my efs partition. In this event you need to go to a repair shop and have them write you a new efs. Once a efs is wiped your IMEI and serial number are irreversibly gone.
My phone fails at hidden.img. Try flashing again if its not working flash a new PIT file and try again.
The file name of my firmware: G925FXXU5DQA7_G925FBTU5DQA2_G925FXXU5DPL3_HOME.tar.md5
Android version: 6.0.1
CSC: BTU
Hope this helps you fix your device
i just cleared my efs with z3x tool..my phone stuck at samsung logo..anyone help me plz
Hi, I restored miui's efs and modem trying to get volte finally working on resurrection remix but once I rebooted android said it's unable to decrypt data though the password is correct. If I reboot in recovery now, password seems wrong even if it's correct and I'm not able to recover the efs and modem backup I did for rr... What gone wrong? Is there any hope to get data back?
Got a Note 4x Mido with twrp 3.1.1-0. Did a full backup, checked every box, and transferred it over to my laptop. Tried some custom roms and wanted to go back to my previous backed up rom. Did a wipe and transferred the backup back to my phone but when I tried to restore it EFS and Firmware were causing error, everything else worked fine, booted up the phone, no wifi, bluetooth, imei gone, provably hard to fix... Tried wiping in all kinds of ways but the EFS and firmware just don't want to be restored.
EFS throws:
Unable to find file system (first period).
Unknown restore method for '/efs2'
EDIT: Tried some different versions of twrp and it worked (only EFS)
Firmware throws:
extractTarFork() process ended with ERROR: 255
Thanks in advance for the help
Try with this procedure and let us know if it worked for you:
https://forum.xda-developers.com/showpost.php?p=73770600&postcount=12