Iphone 4 contracts I'm just evaluating my options here, for the 3GS I went PAYG with £20/month simplicity as that worked out cheaper for me in the long run, I have been doing some calculations now for the iphone 4 and I just want people to have a look at them and see if i've gone wrong with them somewhere: Contract On a £40/month contract (you can upgrade after 16 months, with vodafone anyway hence why I've only done 16 months not 18) £40/month x 16 = £640 £119 for the iphone =£759 Sell my old iphone 3GS for £250ish =£509 June 2011 the new iphone comes out, rather than waiting for the contract to finish, I'd buy the phone outright. cost of new iphone = £500 (estimate) =£1009 Money gained from selling old iphone 4 = £250 (estimate) =£809 New iphone contract upgrade at the end of 16 months = £119 to buy the phone (estimate, may be less, my girlfriend just got £60 off the cost for already being a vodafone customer) =£928 Sell 2nd hand iphone that I bought in June for £400 (estimate) =£528 over 16 months. Is all that right? have I missed anything out at all or c**ked it up? Simplicity Compare this to the simplicity calculations if i continued as I am: Sell old iphone 3GS for £250ish Buy new one for £500 £250 so spent so far. £20 x 12 = £240 =£490 Cost of new iphone in June 2011 = £500 £990 Sell old iphone for £250 (estimate) =£740 over 12 months Are the above calculations correct in peoples eyes on here therefore showing that I would actually be much better off with a contract? Take into account things like costs of future iphone and costs of upgrades are purely estimations based on previous years, they're not going to be far wrong unless the next one is made of plutonium or something.