Unlocked iPhone - Will it work with o2 3G SIM?

Hi guys,

Considering getting an iPhone and unlocking it. I was just wondering whether anyone has tried (or knows) if an O2 3G SIM will work ok (as opposed to the regular GSM SIMs)?

Cheers!

German O2 UMTS (3G) cards working very well. Can confirm this here in germany.

Thanks for the info!

Hi,

I have an o2 UK 3g sim and it works fine.

HTH

Am I the only one that is having trouble with getting my O2 3G sim to work?

I just received it today and have put it into my unlocked iPhone but I'm getting 'No Service.'

When I put it into a different phone, it receives the signal.