Baseband version unknown, IMEI unknown after flashing Helly Bean

[ebol4]

I went to stock GB from an ICS ROM, and then to Helly Bean. Everything seems to work fine except any kind of networking. I cannot connect to 3G or AT&T's stuff (text messages, calls, etc.). I can connect to my wifi network and use it. In the Settings on my phone, Baseband Version and IMEI are unknown. The only thing in my efs folder in Lost and Found. I have no backups, as I wasn't aware that this problem existed.

Not sure what to do. Right now I'm leaving the SIM card and battery out for a few minutes, and then putting them back in to see if that helps. I'll probably flash a modem as well. Any suggestions? Any known fixes?

edit: Tried the battery removal and modem flashing, neither worked. Now going back to stock.

Edit2: going back to stock did nothing. I tried another SIM card, and that one also does not work.

 

[ebol4]

I went back to stock GB again (third time now) and it's now recognizing my IMEI, but I still can't text or call.

 

[4-2ndtwin]

Check your APN. And don't forget to backup that efs folder...just in case.

Sent from my SAMSUNG-SGH-I777 using xda premium

 

[ebol4]

It's not letting me look at the APN settings because it still doesn't detect a SIM card, only my IMEI.

 

[4-2ndtwin]

Anything under Baseband ?? If not try flashin a modem through Odin.

Sent from my SAMSUNG-SGH-I777 using xda premium

 

[ebol4]

Okay, I was definitely having a legitimate problem earlier, before I flashed to stock. At some point in this repair process, my SIM card ended up in my phone upside-down.... woops.

Thanks for trying to help me 4-2ndtwin.

 

[4-2ndtwin]

Ooops...sh** happens lol.
Glad u got it fixed !

Sent from my SAMSUNG-SGH-I777 using xda premium

 

[Yungmo11]

help

please am new here,, having the same problem ,..kindly help me out

 

[BWolf56]

please am new here,, having the same problem ,..kindly help me out

This thread most likely has to answer.

Check your APNs to make sure they match your carrier's.

Check your IMEI to make sure it matches the one with your phone. If it's not the case, you'll need to go back to stock KK4, backup your efs folder with a app that has root rights (like ES File Explorer) and restart the falshing process.

A good backup would be suggested before going to stock!

 

[Sagr_1985]

same problem baseband is unknown and imei is null. help