On my old phone I had an issue with the proximity sensor and front facing camera. This led me to holding my phone backwards to take photos and being unable to hang up phone calls.
I think I put up with this for a year and a half.
I did end up figuring out the issue with the proximity sensor but opening up my phone to reconnect the camera module was too much effort for me.
My phone keyboard right now is constantly showing “< voice input” where the word suggestions should be. This text/button seems to do nothing other than go back to the suggestions when I tap it. It’s quite annoying, and my microphone works fine when I want it.