I recently upgraded the Android OS on my Motorola X 2nd generation from Android 5.1 Lollipop to Android 6 Marshmallow and ran into some problems. I couldn’t make or receive phone calls. The network indicator on my phone just showed “no service”. It bugged me so much and i started conducting research and asking people for help. Then I asked some experts who fix phones about it and they suggested that i try to revert back to Android 5.1 so i decided to give it a try as i was really out of options.
Reverting back to Android 5.1 worked, I can make and receive calls again. I’m going to explain what I did to flash the stock images (which just means the original OS of the device) onto my phone which helped me in reverting to Android 5.1 Lollipop.
I can make calls again :D
Snapshot of the device booted in fastboot mode.
Hope this article helps you with your problem. Thanks for reading.