People cannot hear me properly during calls.

I have an iPhone 6, have had it for over a year now and not too recently a problem has come up.

When I am talking to someone over the phone, they cannot seem to hear me properly and tell me that my voice is very quiet. I often have to repeat myself and/or yell into the phone, which, as you can tell, is very frustrating, inconvenient and ridiculous, especially when I am in public.

None of the solutions people have given on this site or other sites have helped me.

1. I checked if the microphone was being blocked. It was not.

2. I tested it (the microphone) out on recordings and videos... I could hear my voice perfectly well.

3. I tried calling someone on loudspeaker. No problem

4. I tried calling someone on skype (loudspeaker). No problem.

5. I checked settings... couldn't find anything related. I barely chaged anything in my settings anyway other than make certain things private.

6. I tried calling with a headset. No problem.

The only solution I haven't tried is a factory reset. That is the last thing I want to do because my iCloud is full and I do not want to go through the hair-ripping stress of retrieving my notes etc because the iCloud, App store and contact problems I faced early this year nearly drove me insane. Also, I have videos downloaded from Youtube on an app that I cannot retrieve if I do a factory reset, and have non-internet apps and games of which I cannot retrieve the saved data should I do the reset.

I really don't understand how it is possible for my microphone to be fine for everything except normal calls.

Please help me. I need to sort this out. I am schooling and it is so very inconvenient if I cannot contact my parents properly without being on loudspeaker or headset. I did go to a service centre but they wanted me to pay them an insane amount of money just so they can reset the phone for me. They provided no other help and overall seemed uninformed, as if a factory reset is their solution to any problem. 😠

Thanks so much.

-Moya