Why would Apple produce a larger screened iPhone? Because Apple’s extensive research shows there is not much growth available for a 4 inch phone costing more than $300.
Despite the impact this will have on developers with a new screen size there is no choice. This year they can phase out the 3.5 inch screened 4S and have a larger screen and the 5S 4 inch screen model, thereby still keeping to just 2 different screen sizes.
More interesting is the slide below showing why the ended up in this position.
Basically the competition has levelled the playing field and Apple needs to respond. Lets see what they bring out in September or sooner.
Source – http://recode.net
Gavin's Gadgets & Photography 
That’s the trouble with time……. It waits for no man.
If Apple wish to raise the interests of the many Android users who would try an iPhone only if it’s size were larger then Apple needs to start releasing positives now.
The only reason I do not have an iPhone as well as an Android phone is purely the screen size.
Yes, that is the only reason stopping me from buying the most expensive phone on the market….. (even longer pause……) but I would do it in a heartbeat.
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