iphone 4 ultrasn0w no cell data network
iphone 4, 4.01, jailbroken & ultrasn0w - bought with AT&T and am trying to use in Luxembourg with orange.lu, my local provider. Everything else works, but I can only access cellular data about 10% of the time. Sometimes works, sometimes does not. Phone shows 3g connection all the time, but I keep getting the message 'could not activate cellular data network'. Very frustrating. Orange.lu have told me this is because the phone is jailbroken. I have also tried the APN setting route using the site in New Zealand, but to no avail. Any suggestions here?