microphone issue
My mic doesn't work! Everytime I try to record something (video or audio) and also in phone call, I can't speak and even hear my interlocutore. It isn't possible to press "speaker" too.
iPhone 7, iOS 13
Than you may have a hardware issue. Have you restored the device using iTunes and tested again?
https://support.apple.com/en-ca/HT201252
This updates the iOS to the latest version to isolate the issue to either software or harware.
Be sure to backup your phone before you do this.