on 12-05-2015 11:55
on 12-05-2015 11:55
on 12-05-2015 13:35
on 12-05-2015 13:35
12-05-2015 11:59 - edited 12-05-2015 12:06
12-05-2015 11:59 - edited 12-05-2015 12:06
Have you checked with your postcode here: http://status.o2.co.uk/
Have you tried from another location?
on 12-05-2015 12:07
on 12-05-2015 12:07
Also try cleaning the sim and rebooting the phone.
on 12-05-2015 13:35
on 12-05-2015 13:35