Motorola has revived its slim Razr flip phone, some 15 years after the original “game-changing” device hit the market.

The new device features a 6.2in screen which folds together when closed, with another, smaller screen to display notifications on its outer shell.

The device will be sold for $1,500, starting in the US on 26 December, with other markets coming later.

Analysts told  BBC they did not expect the device to have much impact on the global smartphone sales.