May 09, 2015

Why can an iPhone 3GS not have I0S7?

My sister wants to get an iPhone 3GS so I've been looking into it for her and I found that the iPhone cannot get I0S7 but why? I have an iPhone 4s and I have the newest update of I0S8
The iPhone 3GS is apparently not supported because of the age of the hardware. Her best bet is to get an iPhone 4S or newer.
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