iPhone 4S iOS 8.4.1 vs iOS 9.2.1 Build 13D15 Speed Comparison…

So how does the final version of iOS 9.2.1 stack up against iOS 8.4.1 Still there are 19% (as of January 11th) that are on iOS 8.4.1 for various reasons.

One being that they fear it will slow their device down, or of course to stay jailbroken. So let us test and see if iOS 9.2.1 will be able to get more people over to the more feature rich iOS 9.2.1


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