Chosen Solution
When you do calls is the speaker icon greyed out and can’t be switched on? Does the phone take like 5 minutes to boot up all the time? If yes to both it is an audio IC chip fault on the logic board. There are a few pads under the chip that get loose that need to be fixed which connect it to the logic board. A local reputable phone repair shop that does microsoldering can get this fixed for you.
