i just bought this mytouch 4g 3 days ago. When i bought the phone i turned on the screen lock clicks because i like to know when i locked my phone. he click was loud enough and noticeable. Also when i would dial number they were loud enough to be noticeable also. But im not too sure what happened that the phone dial pad is now almost silent and so is the screen lock sound. all the sound setting are on high and the only way i fixed the issue for a small bit of time was factory restoring the phone. can any one help please?