Hi is anyone here clued up on these "USIM's" at all that o2 do? Just wondering how easy it is to transfer from o2 online p&g to the same tariff but 3G as I know they do.
Your phone must be a 3G phone other wise it will not recognise the USIM. If you phone O2 I am sure they will upgrade your account and send you out a new USIM. Hope this helps.