i have this problem on my iphone 4 (i try to do a restore in dfu mode as new iphone) during the call my voice isn't trasmitted to the receiver, i ear a little echo of my voice, I tried to use headphones and the handsfree mode, but the problem persists
if I run recording voice memos, it works perfectly
Questa è una buona domanda?
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Try to use the phone after restore, without loading the backup.
In this mode, you are sure that any apps can make the microphone not working.
Maybe you have some apps that interfere with the microphone.
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