Apple is expected to announce at least two new iPhones at its planned event next week, but according to The Wall Street Journal, the company is still testing versions of the iPhone with larger screens than it has used before. The WSJ cites anonymous sources that claim Apple is working on iPhones with screens ranging anywhere from 4.8 to six inches in size. That would be a dramatic step up in size from the iPhone 5, which features a relatively small 4-inch display.
This isn't the first time that its been reported that Apple is looking to increase the size of the iPhone. Back in June Reuters cited sources saying more or less the same things, and the WSJ itself published a report in July stating that Apple was looking to increase the size of the iPhone, albeit with fewer specifics than included in this report.
The devices Apple is expected to launch next are likely going to have the same 4-inch screen we've seen already, if the rumor mill is to be believed. The WSJ also repeats earlier reports that the alleged iPhone 5S will come with a fingerprint sensor — something that we've heard practically all year — while a lower cost model will come in a variety of colors.
Companies frequently test all kinds of various form factors and display sizes while developing devices, but that doesn't mean they will ever actually bring them to market. Apple's own development cycle that eventually led to the iPhone and iPad has been well documented and shows that the company tried a variety of different size devices before settling on the ones we know today. Whether or not Apple will decide to release multiple versions of the iPhone with bigger screens remains to be seen, but it's not likely that they will be coming anytime soon.