I'm on Talkmobile (Vodafone network), first time that I'm on a contract and not sure what to do. As I said a few pages back I might just stick with the S2, go off contract and get a cheap 10 quid/month Giffgaff sim, but you know what it's like... the upgrade itch is there for sure! Haven't had a call from mobiles.co.uk yet, let's see what they say first.
Think I'll also make my decision based on what is said here once people start playing with the phone, nothing better than some hands on experience from S2 users who moved to the S3.