Chosen Solution
I take the logic board out and clean it. Sim tray look good and ensemble phone again. Work for a night then searching again. Help!!!!
I would imagine it’s either the Lightning dock or the Qualcomm then iPhone 6 Plus Lightning Connector and Headphone Jack Cable Replacement iPhone 6 Plus Lightning Connector and Headphone Jack
have you reset the network settings? made sure time and date are correct? once software is ruled out try checking the antenna is connected properly
