Instapaper developer Marco Arment has created a few mockups and gives more speculations about Apple’s rumored upcoming  iPhone with a nearly 5-inch display without disrupting the existing app ecosystem. Above you see an example of what the “iPhone Plus” will look like. From left to right you see the iPhone 5, Galaxy S III, “iPhone Plus”, Galaxy Note II.

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. 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?

As shown in the picture above, the “iPhone Plus” maintaining the same relative proportions as the iPhone 5 but with the larger screen would measure somewhere between the Galaxy S III and the Galaxy Note II.

Arment offers several other mockups showing what Apple’s iOS device lineup would look like with a larger iPhone.

Source [MacRumors]