My friend’s iPhone (7, iOS 13) answers calls on its own after 10 seconds, with no interaction from him, even if he’s nowhere near it. It used to go to voicemail after 4 rings (the usual 25-30 seconds), but about a month ago it started this odd behavior. I have an iPhone myself, but don’t know a lot about them, and have never heard of this behavior. Can anybody clarify why it does this, and how to get it to return to normal?