With great fanfare, Apple announced the latest in the iPhone range of mobile phones, the iPhone 4 and without too much delay it was available to buy.
Despite underestimating the popularity of the device, which has been phenomenal, leading to many retailers selling out almost immediately there is still strong demand from consumers for the handset.
The good news for those loyal fans who have to wait for the iPhone 4 is that the new operating system was made immediately available for owners of previous versions of the phone to upgrade, so although they can not make use of the new hardware features of the iPhone 4they can enjoy some of the software improvements.








