No sound during calls - Comes and goes
So I have a strange problem no on my iPhone 7. Suddenly out of nowhere it started using longer time to set up calls. And when the call connects, it gives no sound for me or the person im calling. Totally quiet. Does not help to use speaker phone or headset. Then if I try again some time later it will suddenly work as normal. Then it can stop working in the Middle of a call with some strange noises first. I have had the screen changed before, but that was a few weeks ago and it had no problems before. I also tried another screen to rule that out. Also that does not explain the mic not working either
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