Help!!!ATT LG G3 have IMEI number, but unknown Baseband Version - General Questions and Answers

My phone is unlocked. Currently I use Tmobile. After I restore my phone from backup from crash, my phone get signal from Tmobile like on and off. When I check about phone, I see I have IMEI number, but on Baseband Version, it shows unknown. Can you please help me to fix this issue? Thanks you!!!

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Hey everyone,
New here... I have recently been trying out different ICS Roms, all very good and very well made. Although I am having trouble with my 3G... I have none where I used to have it all the time, or it does show but its greyed out and unable to connect to any internet connection.
Tried to google for answers but nothing really makes sense...
Phone Specs:
Model Number: Nexus S
Android Version: 4.0.3
Baseband Version: I9020XXkI1
Kernal Version: 3.0.17-ck1-cfs-g3580382 [email protected]#4
I hope the information supplied will help.
Thank you in advance,
Lee
Did you check your IMEI?
Check what about my IMEI number???
Do you have the correct IMEI? Sometimes the efs can get corrupted and you lose your IMEI (gets assigned a generic one). If that happens you lose connectivity.
Ah ok, not sure about all that, how do I check and also how do I resolve this issue if my IMEI number does not match.
My IMEI number on the back of the phone matches what is shown System Settings>>About Phone>>Status>>IMEI

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Hello,
I have a problem with my Samsung G930F Baseband version and Imei both is Unknown, no signal with im that means crossed circle in the phone i can't call.
In Software Information Baseband version is unknown, Imei too, Who can help me or give soft by odin repairing it.
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Worked for me before

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