About 3-4 times/day, the phone will freeze, shut down, and get stuck in an endless loop on the boot animation until the phone is wiped. If the phone does restart without wiping it, I get error messages in garbled characters and the phone generally freezes within a few minutes, and all my applications are unusable/erased. I get force-closes constantly on system applications like acore even right after wiping my phone and restoring it to factory settings. The phone never switches back to 3g after disconnecting from wifi, and I always have to put in Airplane Mode and take it out of it, and only then will it reconnect.