Chosen Solution
Having strange problems with an iPhone 6. Calls can only be heard through speaker whilst nobody can hear me. Microphone not working even with voice memos. Speaker works fine but if plug in headphone continues to play through speaker. Have replaced charge port and still same issues. Any advice? Know phone recently had a new screen replaced by another tech if that could have caused issues.
I would check for Long-Screw Damage, just in case. There are three microphones on the iPhone 6. There is one for phone calls/front camera videos, one for noise cancellation and one for the rear camera. Check that they aren’t obstructed with dust, wax etc. Small parts are notorious for being hit or miss. Can you confirm that the replacement port is functioning?
It’s the front camera flex iPhone 6 Front Camera and Sensor Cable iPhone 6 Front-Facing Camera and Sensor Cable Replacement
had the same problem with a customer I replaced the charge port/mic flex and fixed all the problems
