Hello, I always buy my iPhone's upfront pay as you go. Yesterday, I bought the iPhone 4s for £345 (Locked to three) brand new and sealed. What I plan to do, is use the three sim only plan for 1 year and then get it unlocked. What is the price of the 4s likely to be next year? (Mint condition, unlocked). The iPhone 4 is selling at around £300 (used) at this very moment. Can I only expect a £40/45 loss? If so, thats great. Please post your response. Thanks.