A genuine unlocked iPhone!
If you need an iPhone on a different network to O2 then this is what you want. Put any SIM in and away you go - even a cheapo PAYG SIM if you want! Worked right out of the box with my Vodafone SIM. Best of all, you can update to the latest firmware with no problems at all using iTunes. Mine was running the latest 3.0.1 version minutes after being unpacked. Well done Play.com for this!!!