Iphone 7 plus microphone not working
Hi,
The problem is microphone issue. I always either use the bose noise canceling adopted headphone to make the call, or I put it on speaker. But today, I did not use either method trying to make a phone call by using the phone directly closed to ear. It is very strong, after I dialed number, I can only hear very noisy sound, I cannot hear another sound from phone unless i put it on speaker. I also tried other software such as whatsapp , it happened the same issue. But after I plug the bose noise canceling adopted headphone, it works. After about 2 hours, everything worked fine, the problem has gone.
Is this software problem or hardware problem, who should I contact with if I had the same problem again?
iPhone 7 Plus, iOS 10.0.2