mobile

I know not all CM12 users have this problem but I did, and here's how I fixed it.

Boot to bootloader, run ADB command "fastboot erase modemst1" and then "fastboot erase modemst2".
Reboot device, problem solved.

I got the info from here, It's in German so I decided to translate and make a post here.

I searched but I didn't see anything about this. And I hope it's in the right category.
If it doesn't work for you plx let me know.