I haven't seen anything about this anywhere, I've been thinking about switching to Three and wanted to know how the signal strength is at home and at my work, so, on the off chance, I phoned Vodafone customer service, I was asked for my number, account password, IMEI, make and model of phone, where I bought it, then the cust service rep said, ok, the forms have gone through, wait up to 4 days, connect to iTunes and check for update. I put a three sim in the phone, checked for update, and nothing, then I unplugged the phone and replugged it back in with the three sim phone and it said activation required. Restarted with the vodafone sim, and got the congratulations, iPhone unlocked page! I can now swop back and forward between 3 and vodafone whenever I like. I'm really surprised, I thought they would make me wait till the 24 months was up, or just plain say no. I thought until I saw it working they had made a mistake and it wouldn't work! Obviously I can't prove this, as iPhone's have been unlocked in the UK since day1, but I've attached a screenshot, showing the unlocked screen in Lion. I bought this phone on launch day, and I'm on the iOS5 GM.