There are no more ardent believers than the BlackBerry faithful, loyal to their qwerty-keyboard phones. For those of the old school, switching to an iPhone is a fear-filled affair – partly because of ‘bill shock’ and partly because they have to give up having buttons to press. Forget your fear. A few pointers will make the transition smoother and pain-free – and hopefully bill-shock-free too. Toby Shapshak walks you through it For the first two months, you should buy yourself one-off extra bundles of at least a gigabyte.