iPhone tarrif Help..

http://shop.o2.co.uk/simplicity-12

It says a 12month contract only sim, I don't really understand what they mean by that... can I use it in a Pay and Go iPhone?

I was just about to order 1, but I don't wanna waste my money if it wont work in my pay and go iPhone o.O

Anyone understand? :)

Moved by preposterous (Forum Moderator) - Thread moved from 'Discuss Anything' as its best suited here.

Yes it should work in your iPhone as it's an O2 sim card, but I don't think you will get internet, so if you like going out and using 3G internet connection, then you won't be getting it on that sim.