[HELP] Repair EFS, no signal after OTA update (Snapdragon version) - Xiaomi Redmi Note 4 Guides, News, & Discussion

Hi everybody. After an OTA update my Redmi Note 4 Global version lost the signal. No mobile networks, can't do a call or send an sms, nothing. IMEI 1 and IMEI2 are ok. WiFi is working OK by the way.
I tried flashing the last MIUI ROM with MiFlash and the problem persist. Tried unlocking the bootloader, installing a custom rom and nothing happend. So I decided to send it to a local service in my city and they don't solve the problem, they f*k IMEI1 and IMEI2, cleaning it up.
Now I don't know what to do, I saw some tutorials to repair the EFS of RN3 but nothing for Redmi Note 4 Snapdragon. What can I do?

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No IMEI and No SIM detects (Service disabled)

I am having hell of problem with my At&t G2 D800. For last 2 months I had issues like INVALID CARD every time I restart/Power off my device.
From last week it got permanent and now I have IMEI=0 , Unknown baseband and Service disabled.
Don't have backup of EFS
Tried Flashing Stock KK Firmware but no way.
Tried to fix IMEI with EFS Professional and it says succeed but after restart its still same.
Can any expert help me or anyone can say is it possible to get my phone fixed? Or should buy a new one

My "fight" with Meizu M2 Note

I'm new to this forum and generally new to flashing phones etc.
I bought a Meizu M2 Note, for testing. To learn to work with the SP Flash Tool.
The phone was broken (€ 7.5). I replaced the charging socket (2 €) and it works.
I tried to install TWRP, but by mistake (and ignorance) I format the whole memory of the phone along with the bootload.
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The phone works, but there is no IMEI.
After several hours of trying to restore IMEI, install StockRom and root by KingoRoot. I did it. The phone has an IMEI (or even two).
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The phone does not connect to the network.
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Redmi note 3 mtk 2015617 with dead EFS partition

As in title. Im my RN3 mtk efs partition stopped working. Even with sim card i still se "no service" notification
what i've tried:
many ROMs installed via TWRP
few ROMs instaled via Flash Tool
https://www.theandroidsoul.com/fix-empty-imei-corrupted-efs-no-sim-unknown-baseband-wifibluetooth-issues-restoring-twrp-backup/
in ADB i see "Partition table doesnt exist"
my phone lost signal. wifi, imei, mac, bluetooth is ok. i went to service and guy told me, thats 100% software problem, but they cant fix it becouse i havent done full backup.

samsung s7 edge lost imei info?

hi all
my partners s7 edge was running very slow so i flashed the stock firmware yesterday and now its lost IMEI information. i have followed guide on here and tried all 3 steps (reflashing rom etc) however whenever i try backing up EMS it fails saying there is no EMS file, she cannot make any calls as its not registering on the network. please can someone help with this???
rumel2011 said:
hi all
my partners s7 edge was running very slow so i flashed the stock firmware yesterday and now its lost IMEI information. i have followed guide on here and tried all 3 steps (reflashing rom etc) however whenever i try backing up EMS it fails saying there is no EMS file, she cannot make any calls as its not registering on the network. please can someone help with this???
Click to expand...
Click to collapse
Hey, I have the same problem, I guess that there's not solution yet.
Try here:
https://forum.xda-developers.com/showthread.php?t=3379516
Sent from my SM-G935F using Tapatalk
Do you a have a efs.img backup ? Or any kind of IMEI/EFS/RADIO backup ?
I had the same problem I flashed the stock ROM and somehow I lost my IMEI info, I tried everything and I was even thinking about buying a z3x box but then I decided to do a very risky move , I completely deleted all the EFS related files/info and reflashed again but now I was not able to boot because I always sent me to recovery mode saying that :
"E:Failed To Mount /EFS (invalid argument )"
Then all I did was installing TWRP and rooted my SM-G935F and then I placed my efs.img backup on my internal SD CARD and went on recovery launched the terminal and wrote this :
dd if=/sdcard/efs.img of=/dev/block/platform/155a0000.ufs/by-name/EFS
Then I wrote reboot and it finally my phone was booting and I recovered my IMEI and was able to use my phone normally.
This only works if you have a backup of your EFS, and even if you do is risky , but I did it because I lost all hope and was accepting the fact that my phone would just become a useless wifi only device .
So there is not a fix yet for this problem ?
I have a problem on my s7edge instead. If i have valid imei i'am almost always in emergency calls, and when the signal comes back does not go into mobile data connection. With the wi fi no problem.Can someone help me i'am going crazy.!
IMEI, Network Signal and Baseband is misssing
Re: IMEI, Network Signal and Baseband is misssing
IMEI, Network Signal and Baseband is misssing
Hi
I am ready to donate if any expert can help me to restore IMEI.
I am using SM-N9500 samsung note 8 model - hongkong version, i frequently change the roms.. when last time i tried to install a custom rom i lost IMEI. i am getting error like IMEI-unknown, baseband- unknown, no network and sim cards not working..
i tried installing stock rom, custom roms, it was installing successfully but only baseband, signal and IMEI are not working. i didnt even back up my EFS folder. So, kindly help me to get back my IMEI.
I have installed stock rom, still no IMEI. now i rooted my mobile and taken EFS backup. is it enough? if yes, pls suggest me the next steps. I also tried installing combination firmware, though is not working, installation was successful and also i am able to see the factory binary logo, after which it will switch off automatically and boot loops. everytime it will open factory binary and immediately it will switch off automatically..
Build number - R16NW.N9500ZHS4CRJ1

Network issue after restoring from hard bricked

I have a Asus Max Pro M1 6gb India. Few days back my phone was bricked after doing some research online i made it usable again but the issue now i am facing is of network and poor battery backup on standby.
Suddenly after few days of normal use i restarted the phone for some reason now i cant connect to 4g, this happened earlier as well, i reflash rom using qfil restored IMEI again, phone works fine but again 1 restart after few days i cant get 4g network, 2g and 3g network working fine, also replaced my sim card tried different sim and manual searching.Nothing works.
Is their anything i am missing or i need a 6gb variant QCN backup file and AFT flashable rom, or anythng i can do to fix it.
my phone is not in warranty sp will the service center will help me, also serial no is messed up.
Please help.!
Firmware version? You might want to install latest official firmware from asus too
Vysair said:
Firmware version? You might want to install latest official firmware from asus too
Click to expand...
Click to collapse
my firmware version is 1910.059. latest from asus
beinghuman23 said:
I have a Asus Max Pro M1 6gb India. Few days back my phone was bricked after doing some research online i made it usable again but the issue now i am facing is of network and poor battery backup on standby.
Suddenly after few days of normal use i restarted the phone for some reason now i cant connect to 4g, this happened earlier as well, i reflash rom using qfil restored IMEI again, phone works fine but again 1 restart after few days i cant get 4g network, 2g and 3g network working fine, also replaced my sim card tried different sim and manual searching.Nothing works.
Is their anything i am missing or i need a 6gb variant QCN backup file and AFT flashable rom, or anythng i can do to fix it.
my phone is not in warranty sp will the service center will help me, also serial no is messed up.
Please help.!
Click to expand...
Click to collapse
Try:
1. Download AFT Oreo 340 ROM: https://forum.xda-developers.com/asus-zenfone-max-pro-m1/how-to/how-to-asus-flash-tool-aft-t3923941
2. Extract AFT zip
2.5. Go to Fastboot mode.
3. Install using flash_all.bat from computer (don't use Asus Flash Tool). Bootloader will be locked.
4. Update to stock Pie
5. Unlock bootloader. (Optional)
Sent from my ZenFone Max Pro M1 using XDA Labs

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