The other person can't hear my voice
Hello, I have a problem with my phone at the level of the microphone, the connection is not heard by the other party
[Edited by Moderator]
iPhone 12 Pro Max, iOS 15
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See -> iPhone 12 and iPhone 12 Pro Service Programme for No Sound Issues
iPhone 12 and iPhone 12 Pro Service Programme for No Sound Issues - Apple Support
Apple has determined that a very small percentage of iPhone 12 and iPhone 12 Pro devices may experience sound issues due to a component that might fail on the receiver module.
Affected devices were manufactured between October 2020 and April 2021.
If your iPhone 12 or iPhone 12 Pro does not emit sound from the receiver when you make or receive calls, it may be eligible for service.