Part of complete coverage on
 

The world's hottest smartphones

Perhaps you've heard of it. The sixth version of Apple's pioneering phone went on sale in stores Friday and boasts a larger screen, more powerful processor, better camera and the ability to run on faster 4G LTE wireless networks. Apple took 2 million pre-orders for the phone in the first 24 hours.

Perhaps you've heard of it. The sixth version of Apple's pioneering phone went on sale in stores Friday and boasts a larger screen, more powerful processor, better camera and the ability to run on faster 4G LTE wireless networks. Apple took 2 million pre-orders for the phone in the first 24 hours.