Bought a iPhone 3G, which has been officilly unlocked by O2 and was fully restored.
However before I re-activated the phone (in iTunes) I jailbroke it with jailbreakme.com.
I have now activated with iTunes and the phone works fine apart from being unable to pick up a 3G signal. The sim card is Orange and picked up a 3G signal fine in my Blackberry.
I have upgraded the firmware which has obviously un-jailbroken the phone, but still no signal.
Works fine over 2G and wifi but this is a bit frustrating.
Any ideas ?