I updated to 13.1.2 a couple days ago and since then, I can't seem to use my mic. I did notice though, that when I was listening to Youtube with headphones, they started konking out on me right after, but since then, I can't hear or speak in phone calls, can't Facetime, can't do voice memos, or use Siri. I've tried a few things, resetting settings, powering off and on, nothing works. Is this likely a hardware issue?
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I'd suggest speaking with Apple Support for this issue.
Let us know how you go.