Chosen Solution
Last week I replaced the battery, the lightning connector assembly, and the volume and ringer switch assembly. Everything works now, but my cellular strength seems lower. I now get no service message in places where it used to work, both at home and at work. Is it possible that I weakened the Cellular antenna(s) with the repair? Wi-Fi is the same as it was. Help! -david BTW
Probably a defective charging port assembly as the main antenna is used from there. If you have confirmed the antenna was plugged in, you will need to replace the charging port again.
