Unjailbreck

[stephen123]

Hi my son jail b his iPhone how do yo un jailb it so he can sell it thanks

[gopher7]

Restore through iTunes, that will remove jailbreak.

[stephen123]

Tried that its on ios6 no signal

[dell_xps]

It was probably jailbroken and unlocked for any sim, where did you buy it from ?
Might be locked to to O2 now, and yer stuck on IOS 6 :-(
You will have to pay for an official unlock or when you sell it you will have to let them know it's locked to a specific carrier.
HTH

[stephen123]

Got it second hand my son unlocked it and jail b it where do you go to get it unlocked thanks

[fijiman]

Follow the link to a post on unlocking iPhone service made by Johnboy1974