I will call my girlfriend's phone (both are unlocked tmo phones on metropcs) and much of the time I will hear nothing, then after about the length of time where I would normally hear it ringing, it goes to voicemail. And it never rings at all on her end. It also happens when someone calls me. From what I can tell it doesn't matter what network the other person calls from, could be metropcs phone or any network. Anyone have any ideas or similar issue? And just to be clear, it doesn't go straight to voicemail like when the phone is off or when the call is purposely declined.