I put in the unlock code and the message came up " Network Unlocked". However now I find that it will work on any network ( orange,virgin t-mobile etc,) EXCEPT o2, which is the one I want. It wont work with ANY o2 simcard, although the signal sign is full. It says "limited service only" on screen.Vodafone told me not to enter the unlock code more than once as it will block up my phone completly.I have phoned both vodafone and o2 for help, but they both say theyve never heard of that happening before. Can anyone help? Many thanks.