The Apple iPhone 4 features a new glass and stainless steel design, high resolution touch-screen, five-megapixel camera with LED flash, HD video and, at last, multi-tasking allowing simultaneous use of different apps. But with prices starting at £499 for a SIM-free handset from Apple, it does not come cheap. Gadget Inspector Claudine Beaumont has been using the phone for a week and gives the low down on whether it is worth splashing the cash for.