Motorola Mobility unveiled the Droid Razr smartphone at a starting price of $249 on Tuesday, calling it the world's slimmest smartphone at just 7.1 millimeters.

The company, which has agreed to be bought by Google Inc for $12.5 billion, also introduced a combined music player and GPS device aimed at fitness enthusiasts.

Motorola uses Google's Android software to power its smartphones. The Razr, sporting Corning glass, will be able to download movies from Netflix Inc and comes with front-facing and back-facing cameras.

The phone, unveiled days after Apple Inc's iPhone 4S hit markets, is the latest iteration of a line-up that helped stage a recovery for Motorola after years of market share losses.

(Reporting by Sinead Carew; editing by Tim Dobbyn)

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