The most expensive phone in the world today is the diamond iphone 5! The most luxurious products are always customized, and a very popular iPhone 5 can be sold for tens of millions of pounds. Jewelry designer Stuart hughes has been commissioned by a Chinese businessman to create the most expensive iPhone 5 in history, with a price tag of 100 million yuan. The price of the iPhone 5 completely overtakes the ordinary gold apple phones on the market.