Instead of the 30-pin connector used since the very beginning on the iPhone (and other Apple hardware, even the iPad), Reuters reports that the next Apple smartphone will come equipped with a 19-pin dock connector in order “to make room for the earphone moving to the bottom”. Of course this is probably not the main reason why because the iPod touch has both the big connector and the 3.5mm headphone jack on the bottom (though it doesn’t sport the huge microphone grill).
Aside from the design refresh this will also mean that the huge number of accessories out there will no longer work with the new phone. You’ll have to get a new one, which will be something accessory manufacturers will love. More here.