So how do you get iPhone4 for 'free'? If you're an O2 customer & you're due for an upgrade. 1stunlock your old phone for FREE on O2's website (link follows). Then on the 22nd download OS4 and upgrade your phone. Negotiate your upgrade deal with O2 (you'll have to pay for the iPhone4 of course). Then sell your old phone on ebay. You'll get £200 or more which should cover your upgrade costs. Goog luck guys!