I have encountered my first bug in iOS 7 GM after using it for about a week now. When I went to modify my current greeting in the voice mail section in the phone app, choosing the greeting button caused my phone to freeze for about 5-10 seconds and then abruptly re-spring. It did this twice and then worked about four times after that, the whole process is intermittent at best right now. Sad that apple would miss something like this in the GM build. Anyone else experiencing this issue or can replicate it?