Originally Posted by mistaarvim
what do you think I should do?
Data factory rest or reflash the factory image in fastboot, if that doesn`t help and your APN settings are correct i would RMA or claim warranty for the device, but first you could contact your operator/provider if there is an issue with their network near you or maybe you need a new simcard.
USE Search: /this thread /all threads/Google before posting your question, you`re most likely not the first one having this issue
Unofficial elelinux CM 11.0 (4.4.4) stock kernel