The most popular model of the iPhone so far has sold out across a number of UK carriers, after price cuts for the earlier edition of Apple’s smartphone continue to drive demand.
The 16GB version of the 3GS is currently showing as sold out at sites for Orange, O2, Three, T-Mobile and Vodafone, suggesting that supply problems could be looming ahead of the fourth-quarter rush.
Apple’s surge, which could leave millions of would-be buyers disappointed this Christmas, follows some substantial reductions for the phone as carriers looked to clear stocks and shifted their focus to the new iPhone 4.
Users will also have been attracted to the handset by persistent problems with the iPhone 4’s antenna, which caused owners to drop calls.
Features of the 3GS include a 3.2 megapixel camera, a digital compass with A-GPS support for easy navigation, a 3.5”, scratch-resistant touchscreen and voice control.
3GS owners are also able to boost the performance of their handset by downloading the latest version of Apple’s operating system, iOS 4.1.
As well as speeding up the 3GS, this brings multi-tasking to the phone for the first time, allowing users to open and switch between apps while listening music or taking a call.
Other improvements include a revamped mail client that offers multiple accounts to be viewed from a single inbox and support for iBooks.