[Q] HELP Please IMEI missing after flashing CM12 - Desire 816 Q&A, Help & Troubleshooting

Hi guys
BIG problem arose
My desire 816 is A5_DWGL ...I flashed CM12 and Everything works fine except that the sim card is not detected, i changed network to 2G and does no help..Press #*06# the IMEI is null
Then i flash back to stock sense rom. the IMEIs are back too.
Is there any possible the i back IMEI from stock rom, and then flash into CM12 rom? or is there another way to get my IMEI back on CM12?
oh, i want to know why my IMEI is missing in this situation? Any explaination here will be grateful!!!
UPDATE:
I FOUND THAT MY BASEBAND VERSION IS UNKNOWN!!
HELP PLEASE !!!

After flashing CM-12, Both SIM are not working. Flashed stock L firmware but still problem is there... any solution?

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[Q] [HELP]

Recently bought a F180S. Converted to E975 ROM. Everything was fine. then i started to work on EDGE problem using a EDGE img files of f180l as one online thred mentioned that it is also valid for F180S.
but when i install edge files BOOOM. Signal gone. NO IMEI with SIM card and a fake IMEI with out simcard. tried to reflash with korean ROM. no progress. tried to E975 ROM nothing happend. again tried to KOREAN RoM and installed BASEBAND nothing happend. then tried The ICS ROM (F180S10) nothing happen. now i am with a Brick can any bode help me? i have no ESF backup etc..
HELP? PLZ

N7100 IMEI changed to 0049 after flashed CM12.1

Hi guys, my n7100 IMEI changed to 0049XXXXX after I flashed CM12.1 from stock 4.4.2(France, but i forgot which version.) and I found that my N7100 cant recognize my sim so I flashed the stock 4.4.2 (form HK.) IMEI still missing.
I haven't backup my EFS. Is my phone dead? what can I do to get back my IMEI?
UPDATE: I got this on my main screen, is my phone dead?
H/W:Not active
RF Cal Date: Unknown
anyone help?
ryo2456 said:
anyone help?
Click to expand...
Click to collapse
flash stock ROM from sammobile via ODIN and you should be good to go
yaro666 said:
flash stock ROM from sammobile via ODIN and you should be good to go
Click to expand...
Click to collapse
still 0049......
and
H/W:Not active
RF Cal Date: Unknown
did you fix this problem?
I upgraded to lollipop, iemi to none,
and my backup been deleted my mistake, which I lost EFS partition as well.
would like to make the phone signal back. please help.
same problem my phone N7100 with GN4 v2.1 imei 0049 SIM Card no Work (( any one could help
Stock rom dasnt help still efs corrupted
Sent from my DG800 using Tapatalk

HTC Desire 816 Dual Sim Indian Variant Baseband Version & IMEI Null (NO SIM)

Hello,
As i am new to this forum and i am not sure that this will be replied. Still here is a little problem. Couple of months back my small brother bought HTC Desire 816 Dual sim Indian Variant (Qualcomm) phone which Cellular network was not working. Going deep in problems i came to find out that it has baseband version was unknown & IMEI was null. Some sites on google told flashing wrong ROM can cause this problem so find good ROM and Flash it. I Unlocked bootloader flashed custom ROM(Cynogenmod Nightly) via TWRP recovery. Still same problem. I tried that indian backup file tried different ROM but none helped. And yes when i tried to flash kitkat or lolipop or Marshmellow the phone just keeps restarting. Now i am using resurection Remix rom.
PS. Fastboot details Attached
Thanks

Lost IMEI and Baseband version - NO REGISTRY ON NETWORK - PLEASE HELP - SM-A550F

Hello everyone!
I was flashing a custom rom and I realised that my sim card is not detected...
I tought that it was a problem with bootloader and modem so I flashed them and still, the sim wasn't recognised.
Then I went to the settings to check IMEI and baseband and it was unknown...
After many and many tries I still can't feagure out how to fix this...
I flashed it to a stock rom and the baseband is still unknown...
I changed the imei with xposed extension succesfully but the sim still doesn't work because of baseband.
Please help me... *I was stupid for not making a backup*
My phone: SM-A520F
DjamboBuksne said:
Hello everyone!
I was flashing a custom rom and I realised that my sim card is not detected...
I tought that it was a problem with bootloader and modem so I flashed them and still, the sim wasn't recognised.
Then I went to the settings to check IMEI and baseband and it was unknown...
After many and many tries I still can't feagure out how to fix this...
I flashed it to a stock rom and the baseband is still unknown...
I changed the imei with xposed extension succesfully but the sim still doesn't work because of baseband.
Please help me... *I was stupid for not making a backup*
My phone: SM-A520F
Click to expand...
Click to collapse
I face the prblm some days ago. And i disappointed when i saw this. At the same time my one frnd suggest me to look xda. Then i found my solution against the same of ur problem.
And now i flashed the RR rom. It running smoothly. No bugging.
---------- Post added at 04:16 PM ---------- Previous post was at 04:13 PM ----------
U should flash update modem and boot loader. After the flashing rom. I think it'll fixed ur problem 100%.
DjamboBuksne said:
Hello everyone!
I was flashing a custom rom and I realised that my sim card is not detected...
I tought that it was a problem with bootloader and modem so I flashed them and still, the sim wasn't recognised.
Then I went to the settings to check IMEI and baseband and it was unknown...
After many and many tries I still can't feagure out how to fix this...
I flashed it to a stock rom and the baseband is still unknown...
I changed the imei with xposed extension succesfully but the sim still doesn't work because of baseband.
Please help me... *I was stupid for not making a backup*
My phone: SM-A520F
Click to expand...
Click to collapse
You made sure you flashed the right modem and bootloader for your model/carrier as different ones have different bandwidths.
Sent from my SM-A520W using XDA Labs
i had the same issue , you need to flash the same firmware that came with your device but all of it ap cp csc also for bootloader use one more recent because it isnt allowed to downgrade , (for example my phone had the xeo csc and flash cos to make 4g lte working in another country and carrier but lost imei and sim , to fix it i had to flash the second XEO firmware found on sammobile witch was the one the phone had when i bought it

Baseband unknown, imei unknown, sim not detected

Dear helpers,
I flashed my galaxy s9 with TWRP and tried to flash a rom with it.
The rom wasn't working and I had already performer a full wipe.
When installing another rom i found out that i lost my imei, baseband and my sim isn't detected anymore.
I already tried to flash stock from sammobile, but that doesnt work either.
Does anyone know the solution for my problem?
Kind regards

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