Just had a call from someone called 'Deano' -(yeah like I would speak to someone who introduced themselves as Deano!! from the Mobile Advice Centre - he said he was phoning on behalf of O2 to see if I was due for an upgrade and asked me all kinds of questions about my telephone usage - halfway through I stopped him cause my other line was ringing and decided to give O2 a quick ring to see if this guy was genuine - apparently he was not and what they do is set you up a new account and start billing you - be careful all!!