everytime i want to record a snapchat video it doesnt record any audio, or whenever i make a phone call the other person doesnt hear me unless i activate and use speaker the speakers to talk any solutions?
How about using a headphone with a mic, or Bluetooth headphones--do those pick up your voice ok? If so, then it would seem that the microphone is defective. Since you're probably still under warranty, I'd contact HTC for warranty repair/replacement.