My phone has been acting up lately. I leave it on Wifi at work, where there is a Wifi network I can connect to but not actually use, as it saves the battery. I still get calls, I think I still get texts, just not email alerts and such. Then when I go to leave work, I shut off Wifi, try to open Google Maps, and it ends up hanging, program crashes once or twice, 3G signal rarely shows up, et cetera.