No Service after update

OMG
So my dad had unlocked my iphone from someone after it was locked to Bell.
Then he told me not to update but I did anyway and got ios 6 before i had 5.1.1 (i think)
So then when I restored my iphone and everything there was no service and after searching for forever and then it started searching again and again but it keeps coming up as NO SERVICE! WHAT SHOULD I DO!

Factory unlock is the way to go. TRY AppleUnlockCodes.com they unlocked my iphone 5 in couple hours.