Does Apple slow old iPhones when a new model comes out?

Tests show that 'upgrading' to iOS 9 causes 'noticeable slowdown' in the iPhone 4S, 5 and 5S

iPhone 5
(Image credit: Getty Images)

Side-by-side tests have shown that iOS 9 makes older iPhones perform more slowly, lending weight to long-held suspicions that Apple might deliberately make its older devices slow down to encourage users to upgrade to newer models.

Tests carried out by vloggers iAppleBytes, show that the latest mobile operating system, iOS 9.0.1 creates a "noticeable amount of slowdown with the new update", The Guardian reports.

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