I just flashed official LS 3.0 nightly for e975 and my phone said No service with my carrier's name after it. I tried going to settings and noticed network mode is set to 4G but I couldn't change it back to 3G or 2G. Flashed my old nandroid backup and it worked again.
My phone is a F180K.
What is the problem here? How do I fix it?