This web site uses cookies to improve your experience. By viewing our content, you are accepting the use of cookies. To find out more and change your cookie settings, please view our cookie policy . Close How to trim your SIM to iPhone 5 nano-SIM size If you're lucky enough to have bagged an iPhone 5 and are wondering how to squeeze your current SIM card or micro-SIM into that teeny-tiny slot, then you'll need artistic precision and the slicey dicey skills you picked up in biology class, as well as a head for geometry. I took this exam, passed with flying colours and will show my workings out below (for you to copy, because we're friends, right?). Since the nano-SIM is not only smaller than a standard SIM but also 12 per cent thinner, there was some debate as to whether you'd be able to go all Edward Scissorhands on your current chip, in the same way you could to create a micro-SIM . The proactive chaps over at network GiffGaff gave it a shot though , and discovered that the iPhone 5 tray is perfectly capable of handling a SIM of standard girth. It may be the case that future phones requiring a nano-SIM may not have left room for these extra millimetres though, in which case, head over to our pals at CNET Asia to discover how to painstakingly sand your SIM down to size . To cut or not to cut Before you go any further,