3g/edge only problem...please help

so i drained my battery all the out last night to charge over night. hoping ti will calibrate the iphone4. well i wake up this morning to find out that my 3g/edge doesnt work at all. it will not lod iheartradio or safari. but i have wifi at my house and it works perfectly on wifi. it will load everything on wifi.

what could be the problem? i have resprung multiple times, rebooted several, hard reset several times too. it turned data off and 3g off then turned back on. but nothing has helped.


please help!!!

 

thanks so much! i didnt even think to do that.