Error
Hi I recently purchased a iPhone 4 locked onto o2, the wi-fi works fine, but it seems I have no 3g, I get the above message whenever out and about, I have been into settings and 3g and mobile data is enabled, A quick google of the problem seems to find many people with this issue, but no answers. I have reset settings to original state and rebooted but still no result. Any help will be greatly appreciated.
APN is set to idata.o2.co.uk
username vertigo
Password is "starred"
Solution
Try changing the APN from idata.o2.co.uk to mobile.o2.co.uk
Notes
To get to the correct area of the settings:
Tap Settings
Tap General
Tap Cellular or Mobile Data
Tap Cellular Data Network or Mobile Data Network
Links
http://community.o2.co.uk/t5/Apple-iOS-Devices-iPhone-iPad/quot-you-are-not-subscribed-to-mobile-data-service-quot/td-p/229441
http://community.o2.co.uk/t5/Apple-iOS-Devices-iPhone-iPad/Not-subscribed-to-cellular-data-service/td-p/624504