I think it will be a 5S, like there was 3G->3GS, 4->4S.
Unless Apple breaks tradition and will possibly make a much larger iPhone6 to compete with the 4.7-4.8" Android tablets, and a 5S will be a 4" one with upgraded internals.
But given how long it took Apple to break from the 3.5" screen to 4.0", I somehow doubt it. -- F**K THE NHL. Go Blue Jays 2013!!!
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