This is a discussion on Network problems after jailbreaking iphone4 within the iPhone Jailbreaking forums, part of the iPhone Hacking & Jailbreaking category; Hi
Just jailbroke my iphone 4 on O2,now can't get network,any ideas on how to make the network work again.
cheers
Bekasi...
Did you install anything else? I completely lost network when i installed sbsettings and regained signal when i uninstalled it but as for just the jailbreak i guess its always possible but highly unlikely. Your best bet is to do a fresh restore then jailbreak then restore from backup