Chosen Solution
My iPhone 6 lost cellular service (No service) and it has very week wi-fi reception (2 bars when next to router - none with a wall in between). I’ve replaced SIM without success; SIM works on other phone. Phone hasn’t been in water, but a light drop on top left corner that chipped glass. Can the antenna go bad or become disconnected? Any other possibilities?
The wifi antenna disconnects sometimes due to shocks but only way to see that is by removing the motherboard from the phone and check the connection. For the cellular part you can do a quick check by dialing #06# if the IMEI n shows is the antenna if doesn’t show then you have a baseband chip issue.
