I'm able to text/make calls but since yesterday morning, my emails won't refresh and I can't connect to the internet or other online apps unless I'm at home and using my wi-fi connection. Everything seems to be up (3G, etc) but why won't anything work? I've tried disconnecting my network connections and reconnecting, turning the phone off and on. I haven't changed any settings so I'm not sure why it isn't working all of a sudden.