I am dealing with very serious problem with my phone. I was trying to flash stock ROM using fastboot. It failed, and start showing no sim card, empty IMEI, and no wifi either. I am finally able to fix it by flashing the modem partition, but still SIM cannot register to network.
When I go to manual network selection page, it search for them sucessfully too.
I am noticing two issues there:
A) It cannot register on any network
B) It don't list any 4G network.
How do I fix it. My phone is Lenovo P2.