There are many threads about calls or microphones cutting out on iPhone 7 but I haven't found a thread that matches my experience.. Wi-Fi calling is turned off on the phone's menu, but I have Wi-Fi in this house and my phone's Wi-Fi is generally turned on. I'm in the middle of a phone conversation, using what I assume is my AT&T cellular connection -- we have reasonably good LTE service. Several minutes into a conversation I can no longer be heard. I can hear the other person - usually they're saying "I can't hear you". I tried an experiment - when this happens I turn off the phone's Wi-Fi connection and my microphone is restored immediately. Any idea why this might be happening? My wife also has an iPhone with AT&T, no such problems. Is it possible that my phone is defaulting to Wi-Fi calling somehow?