Motorola RAZR (pronounced /ˈreɪzər/ "razor") is a series of clamshell mobile camera phones by Motorola. They were first developed in July 2003 and introduced in the fourth quarter of 2004,[1] with sales starting the following year.

Because of its striking appearance and thin profile, it was initially marketed as an exclusive fashion phone,[2] but within a year its price was lowered and it was wildly successful selling over 50 million units by July 2006, making it the most popular clamshell phone.[3] Over the RAZR's four-year run, Motorola sold more than 110 million units, boosting its position to second place in the handheld market behind Nokia.[4] PC World put the RAZR at #12 in The 50 Greatest Gadgets of the Past 50 Years.[5]

The RAZR series was marketed until July 2007, when the succeeding Motorola RAZR2 series was released. Marketed as a more sleek and more stable design of the RAZR, the RAZR2 included more features, improved telephone audio quality, and a touch sensitive external screen. The new models were the V8, the V9, and the V9m.[6] However, Motorola relied too long upon the RAZR and its derivatives,[7][8] being slow to develop new products in the growing market for feature-rich touchscreen and 3G phones, so the RAZR's appeal declined while offerings from rivals such as the LG Chocolate and iPhone captured consumer attention, and Motorola eventually dropped behind Samsung and LG in market share for mobile phones.[4] Motorola's strategy of grabbing market share by selling tens of millions of RAZRs led to them slashing prices, cutting into margins which resulted in heavy losses in the cellular division.