My phone randomly uses data for huge amounts of time. I've seen it happen at least 10 times. Both 3G arrows are going nuts for no reason and it drains my battery completely in no time. Bluetooth, 4G and GPS are always off. It can happen first thing in the morning, or later. I can reboot the phone in an attempt to stop it, but it just resumes once the phone is back up. No apps are running. I really don't even use the phone for anything other than texting/calling honestly. Once I notice it's happening, I usually only have an hour or so before the phone is completely dead. It's bulls#it. Running rooted with Mikfroyo. Not overclocked.