Can't connect ipad on 3G - you are not subscribed to a cellular data plan

[Anonymous]

I just received my 1gb preloaded SIMM for my new ipad. Installed it and registered the SIMM ok. The ipad in settings shows the SIMM as registered and I can even go to the registration screens using mobile data only. However if I try to connect safari or any other service using just cellular data the ipad tells me I'm not subscribed to a cellular data plan and asks is I want to subscribe. Clicking now takes me to the O2 plan registration screen where I can log in and see the registration.

I have tried connecting through iTunes, updating iOS, tried various APN settings suggested in other forums - and now reset to those originally provided. the ipad has been reset, rebooted and I'm just about to start tearing what little hair I have left out...
Any suggestions?

[Anonymous]

Definitely a case of finding the right person - two pretty hopeless online chats with "gurus" (even when I directed them to this thread....), just telling me it'd take time, or to clean the SIM card - but then went into the Lancaster store this morning, the woman there had seen the problem before, was straight on the phone to their support asking them to push £0.01 of credit to the account, bit of fiddling around with username/password settings - and all sorted in 5 min. So well done Lancaster store (Natalie?)