I have seen people reporting shutdowns and restarts with ICS 4.0.4, but in my case, since the last update in early or mid December, whenever the AT&T contact synchronizer kicks in, my phone freezes for a good while. Is anyone experiencing this problem? I don't see how to disable that synchronization. Another problem is that I often lose coverage in areas where there is coverage (by looking at my wife's iphone). I have to either restart the phone or set it to airplane mode and then disable airplane mode to get coverage again. My wife is pregnant and due anytime. I can't rely on this phone working at a critical moment!