One of the big attractions of Apple’s iPhone is its intuitive user experience — it just works. The iPhone often outperforms the competition, but every device begins to slow down with age. New iOS updates can be a double-edged sword, sometimes rendering ...

Stop me if this sounds familiar: Your old iPhone just doesn’t have the same pep it used to and you’re desperate to speed it up. Ignore the nasty iPhone conspiracy theory — the real reason for the slowdown is rooted in battery chemistry, diminishing ...