Please, please, please do your research. When they cold call, tell them you want to think about their offer. Do not sign over the phone. Take the time to work out the financials. Unfortunately, I had a lapse in judgement and didn't do this, I signed up without working out the figures. I am now in a 36 month contract, when I only had 14 months left of my O2 plan - and I haven't saved a penny. In fact it may end up costing me more in the long run. It has caused a lot of head ache and heart ache for me. Make sure you take the time to work out the costings and see if it works for you as an individual. At the end of the day, they are just a big business, they don't care about saving you money in the long run - they just want you on their books, in a contract you can't get out of. On a plus note, the staff have been friendly, I think this is what seemed so unfair, the staff are friendly, kind and seem genuine, but sadly they didn't take the time to look into if the contract would help me/would be right for me. As a small business I earn £120 a week. I try hard to look after my money. I was only paying £24.72 per month for my plan with O2, I had14 months left - this would total £346.08. They offered £19 a month (first payment being higher at £23.69) with upgrade in 18 months - which totals £346.69. Then obviously I will still be tied in to another 18 months with them, which I have no clue what my costs will change to. Just DO YOUR RESEARCH and work out your own personal FINANCIALS and what you might save, because otherwise you may end up paying a lot more in the long run.