Razr flip phone revived

Motorola Razr flip phone revived with foldable screen

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