Apple has started field testing of a new iPhone with a 4.9-inch display, says Chinese site C Technology. The site doesn't have any additional information, but the claim is consistent with numerous reports suggesting that Apple has been experimenting with larger iPhone displays. A recent Mac Fan story specifically suggested that Apple wants a 5-inch, 1080p display. A Bloomberg piece hinted at the possibility of curved glass, and not one but two models with bigger screens.
For Apple, upgrading to a larger display may be essential. While the company has insisted on the value of being able to hold a phone one-handed, its competition has switched to screens measuring at least 4.5 inches, often closer to 5, and in some cases as big as 5.7 or even 6.3 inches. The iPhone 5s measures a far smaller 4 inches.