updated 12:20 pm EST, Fri January 3, 2014
Reports still conflicting on possible sizes
Later this year, Apple is planning to release iPhones with displays measuring 4.7 and 5.7 inches, according to Chinese site C Technology. The information is alleged to come from anonymous Foxconn executives. It's expected that both phones will come with biometric features, such as the Touch ID sensor already in the iPhone 5s.
While most reports have agreed that Apple will increase the size of iPhones next year, there have conflicting accounts of how big they might get, and whether or not the increase will apply to one or more models. The C Technology story may be consistent with an October DisplaySearch claim that Apple is testing 4.7- and 5.7-inch displays, and possibly a Wall Street Journal piece from September suggesting testing of screens up to 6 inches. KGI Securities' Ming-Chi Kuo has argued for a single bigger device between 4.5- and 5-inches though, and Cantor Fitzgerald analyst Brian White speculated about a phone that "could approach 5 inches."
Last month, C Technology itself hinted that Apple might be testing an iPhone 6 with a 4.9-inch screen. In November, Bloomberg stated that 4.7- and 5.5-inch iPhones are in development.
Apple has been under pressure to increase the size of iPhone screens for some time. In 2012, even as competing Android devices were approaching or surpassing the 5-inch mark, Apple's iPhone 5 only stretched the iPhone from 3.5 to 4 inches. Some smartphones are already over 6 inches, though unlikely to grow any further, since that would put them in tablet territory.