Should you upgrade to an iPhone 4S?
Power and performance
iPhone 4: The older iPhone 4 falls down with its weak single-core processor that seem positively antediluvian compared to the current crop of next-gen smartphones. The lack of dual-core also means greater power consumption. Tut tut.
iPhone 4S: Gamers, listen up. The iPhone 4S's dual-core A5 chip is twice as powerful and delivers up to seven times faster graphics. Launching apps and browsing will also feel quicker and more responsive than the iPhone 4, plus Apple claims its new hardware gives near-4G speeds over a 3G network. Impatient multi-taskers will do well to splash out on the iPhone 4S.