HTC One M8 Telstra No Sound, Unable to Play Audio, Can't make Call!!

Hi everyone, I just factory reset my M8 (on Stock, unlocked) but 1 problem remain, it has no sound/inaudible. So there's any sound from my phone and can't make call either. When I try to change ringtones/notifications a message pop-up "unable to play this file".
I've search forums and tried everything I've read related to my problem for 2 days now, no luck.

Please help! :(

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