Apple has begun shipping a souped-up so-called "iPhone 4S" to games and app developers, in preparation for the forthcoming launch of the new iPhone 5.
A select few games devs have received the new Apple iPhone, to help them prepare the best titles possible for the iPhone 5 launch.
A5 chip in iPhone
9to5Mac reports that the new handsets feature Apple's super-nippy A5 chip, allowing developers to create the fastest and best-looking mobile phone games yet possible.
The A5 chip powers the Apple iPad 2 and is considerably faster than the A4 chip in the iPhone 4 and first-gen iPad.
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9to5Mac's source claims that the "iPhone 4S" is almost identical to the current iPhone 4, apart from the inclusion of the newer, faster processor.
The "iPhone 4S" also apparently runs a specially adapted version of iOS4, created to work with the A5 chip in the iPhone.
The iPhone 5 is rumoured to be launching later this year, with no official word, as yet, from Apple.
You can read TechRadar's comprehensive round-up of all the latest iPhone 5 rumours to get the full low-down on what's in store.