“The recently rumored, larger-screened ‘iPhone Math,’ or more likely ‘iPhone Plus,’ is plausible as an additional model (not a replacement) alongside the 4” iPhone,” Marco Arment blogs. “And there’s a good chance that it would have a 4.94”, 16:9 screen.”

“The theory is easy to understand: perform John Gruber’s Mini-predicting math backwards. The iPad Mini uses iPhone 3GS-density screens at iPad resolution. What if an iPhone Plus used Retina iPad screens with iPhone 5 resolution, keeping the rest of the design sized like an iPhone 5?” Arment writes. “By keeping the pixel dimensions the same as the iPhone 5, no app changes would be necessary.”

Arment writes, “Its 640 × 1136, 264 DPI screen would measure 4.94” diagonally, and it would look roughly like this next to an iPhone 5:”

iPhone 5 (left) vs. "iPhone Plus" (image: Marco.org)

iPhone 5 (left) vs. “iPhone Plus” (image: Marco.org)

Much more in the full article, including the new “iPhone Plus” next to Apple’s other iOS devices and versus Samsung Galaxy S III and Galaxy Note II, here.

[Thanks to MacDailyNews Reader “Dan K.” for the heads up.]