Update done!
When to change iPhone charging port dock connector flex cable?
1. Unable to charge for iPhone (the most common problem)
2. The other party can not hear you during a phone call, there are 2 microphones in charging port dock connector flex cable
3. None or poor GSM signal, there is a GSM antenna in charging port dock connector flex cable
4. Vibrator can not work normally, vibrator is connected to motherboard with charging port dock connector flex cable
5. Loudspeaker can not work normally, loudspeaker is connected to motherboard with charging port dock connector flex cable, too.