Last year I read something about o2 simcards. Pretty sure it was on here.
Apparently if you topped up the simcards with ten pound you got so many points, and if you sent a MMS message from abroad to the UK rather than it charging you it took of some of these points.
Not explained myself very well have I

I ordered them last year but they didn't come in time for my hols. Got them out for this summer but can't quite remember how it all worked.
Had a quick search but couldn't find anything, can anybody help??