Just had a really odd problem that I have not seen pop up yet. I had just finished a call and my phone rings again, but this time you can hear it ringing (and it vibrates) but the screen doesn't come up. The call ended and I pressed the power button (didn't power it off) and the screen came on, but then the phone started acting weird and wouldn't make or receive calls/no signal. I reset it and now it seems okay...but has anyone else had this issue? I am hoping it is a software glitch, but who knows.