Mine started doing this yesterday also. I had to pull my battery, and it started working again. Also, some of my calls would go just to voicemail, and my text messages would not come through when people would send them. This morning, it dumped 15 messages, & half of them were from yesterday. When my phone does ring, and I miss the call, the backlight just stays on until i reconize I missed it. I called tech support last night, and there just sending me a new phone. They couldn't figure out why it would do that, but said the update must have messed up the software.