iPhone 12 Pro
Why doesn’t my volume buttons work on my iPhone 12 Pro and when I make a call I can’t hear anyone on the other end and the speaker phone doesn’t work or the add caller button on the call?
iPhone 12 Pro, iOS 14
Question marked as
Do you have a case on the phone? Try it without the case.
Otherwise:
https://support.apple.com/en-gb/HT210221
Before starting a repair, it might be worth restoring your phone first.
https://support.apple.com/en-gb/guide/icloud/mm7e756df7fd/icloud