Beware New v1.1.1 Firmware From Factory on iPhones

BEWARE of new iPhones on eBay that have been built week 39 or newer as these have the new firmware of v1.1.1 from the factory, you can check this by the serial number of the iPhone in the format of 7T738XXXXXX 38 being the build week.Please ask your eBay seller the serial number of the one they are advertising. You will not be able to downgrade the baseband firmware to v1.02 on these later ones and therefore your expensive iPhone will be a great doorstop.Eventually all the stock of these earlier ones will disappear, so most coming over to the UK from the States will be the later firmware.Try to buy one that has already been unlocked, therefore you will know for sure that it has correct firmware.