Just flashed and get problem with GSM. Cant get my phone fixed in any provider.
If I look under power panel, seems android is enabling and disabling airplane mode constantly.
And under notifications panel, it goes from "emergency calls only" to "no service" constantly.
PS: the phone goes so hot....
Came from XT1650-03_GRIFFIN_RETBR_NPL25.86-15
Did you wipe/factory reset ? and wipe system partition ?
Try to grab logs