Worse battery life. GPS not locking on signal. Keyboard lag. Problems connecting to AT&T voice network. GPS and battery functions showing large data usage. Contacts crashing. Contact doubling in texts (see below). Screen freezes during web browsing. Greater memory usage. Camera malfunctions. Wi-Fi constantly scanning, disconnects and huge data downloads. Note this kind of problem has been reported on the in other Samsung Galaxy S II models when updated to ICS 4.03 which was fixed for many with 4.04. Some workarounds include performing a factory data reset or creating a new Wi-Fi network on the phone using 2.4GHz only. Another fix is to Go to the Wi-Fi settings, click and hold the network you have saved eg:linksys, go to modify network config , then tick a box for show Advanced options, .. Change from DHCP to static. Use Wi-Fi button on the power savings widget to turn on/off and Go Settings, Wireless and networks + more, enable and disable Wi-Fi Direct. Samsung Galaxy S II Skyrocket Update to Android 4.04 ICS with Bugs Reported | WIRELESS AND MOBILE NEWS ***NOTE*** This will not all happen to everyone, these are just a few things people have reported, and wanted to let you know if you experience these, you aren't alone, hopefully Samsung/At&t rolls out an update to address certain issues.