Develop Bugs

Imei null/null and unknown baseband no efs backup

Hi everybody I have a big problem with my ATT galaxy s3 after I brick it(Newbie). And then I installed a 4.4.2 rom and it works now but my imei is null and the baseband is unknown and I cant connect to wifi. I have tried all solutions in the web efs pro, Qpst , nv writer and nothing fixed it the nv writer showed that the spc is incorrect and the efs pro showed that the injection of the imei was successfully but nothing happened in the cellphone. I tried to flash the 4.1.1 stock rom because I bought it with it but odin fail and triangle away too(I trip the counter).(I dont have a backup of my efs)
I NEED YOUR HELP PLSSSS. (I don't want to spend a lot of money repairing this) I need a tutorial:crying:My sim card is not recognized

What bootloader and modem is on your phone?
Do not attempt to flash anymore stock ROMs on your phone until you know the current bootloader. Sounds like you have at least a 4.3 bootloader and attempts to downgrade the bootloader can brick you phone.

audit13 said:
What bootloader and modem is on your phone?
Do not attempt to flash anymore stock ROMs on your phone until you know the current bootloader. Sounds like you have at least a 4.3 bootloader and attempts to downgrade the bootloader can brick you phone.
Click to expand...
Click to collapse
it shows I747UCUNE4 bootloader
and I cant see the modem because the baseband is unknown
help me plz

You probably need to flash an ne4 modem.
http://forum.xda-developers.com/galaxy-s3-att/general/modem-4-4-2-modems-i747-i747m-t2856577

audit13 said:
You probably need to flash an ne4 modem.
http://forum.xda-developers.com/galaxy-s3-att/general/modem-4-4-2-modems-i747-i747m-t2856577
Click to expand...
Click to collapse
bro, I have no words jeje thank you very much,you are the best thank you for this :victory::crying:

IMEI null and Baseband Unknown

Hi,
I have a Galaxy tab S 10.5 and my UK sim card wont work in it because its saying it has no IMEI and the baseband is "unknown"
I brought this tablet second hand so dont know the full history of it.
Whilst trying to troubleshoot it through it has Lollipop 5.0.2 but the CSC was belonging to Italy (ITV). Before i played, the AP was T805XXU1BOJ1 and the CSC was T805ITV1BOG1
I have used Odin and tried flashing back over the top a UK version of the stock 5.0.2 firmware which was successfull but still the IMEI is null and Baseband unknown. The AP is still T805XXU1BOJ1 and now my CSC is T805BTU1BOI1
Is there anything else i can do please to try and get the IMEI and baseband back so i can use it for cellular as well as wifi?
Thankyou

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

How to Get original IMEI number which is lost after flashing Stock ROM ?

I'm wondering how can I get my original IMEI number which is lost after flashing Stock ROM via SP Flash tool. I mistakely selected Format + Download option in SP flash tool while flashing, Now after flash process is done, there's nothing showing in IMEI status. I lost my Phone's box too where original IMEI is printed. Now I have no Original IMEI of my Phone. I s there any way to get original IMEI number of my Phone's Model Lenovo K8 note XT1902-3 (oreo) ?
Thanks