Preview at WWDC likely in June, followed by September launch.
European Carriers Stockpiling Nano-SIMs Ahead of Expected Upcoming iPhone Launch
Operators expect that the iPhone will feature the nano sim in a slimmed down design, according to two sources with knowledge of the situation, and have begun to store millions of the cards in warehouses in anticipation of high demand for Apple’s iPhone. Apple declined to comment.
Operators were caught off guard by the adoption of the micro Sim for the iPhone 4 as well as the original iPad two years ago, with some struggling to meet demand with their own micro-Sims in the first weeks of sale.
One informed person said that the major networks were keen to be ahead of demand this time, however. He added that the iPhone 5 was likely to be similar sized as the iPhone 4 although slimmer and with a fully metal body.
Apple's nano-SIM design next to current micro-SIM (Source: The Verge)
Back in May, however, one iPhone parts vendor posted what was said to be the SIM tray for the next-generation iPhone, with the part appearing nearly identical to the micro-SIM tray found in the iPhone 4S. If that part is genuine, it would appear that Apple has either chosen to continue using the micro-SIM standard or has quickly changed course with the ratification of the nano-SIM standard to embrace the smaller design.