A picture has emerged amid claims that Motorola is looking to make its forthcoming and much-rumoured Moto X Android phone a more fun and less drab device which, perhaps, the company has been known for in the past.

French website Nowhereelse claims it was sent an image from one of its sources inside Motorola's US manufacturing operations whicshows several rear cases for the new phone. They come in several colours - with green, red and purple versions pictured - and the idea is that you will be able to customise your Moto X handset by removing the back and replacing with another. It's a similar concept to that utilised by Nokia with its 3310 handset released at the start of the Noughties.

The source, who wishes to remain anonymous, says that no fewer than 16 different coloured shells will be available although we do still retain a sense of scepticism as the ones in the picture look more like external protective cases rather than actual phone component parts. Also, Nowhereelse has also been the main source behind the pictures of coloured budget iPhone shells that are making their rounds, and we're taking those with a pinch of salt at present.

Previous rumours suggest that the Moto X will have a 720p screen, 1.7GHz dual-core Snapdragon S4 Pro processor, 2GB of RAM, 16GB of internal storage, a 10-megapixel rear-facing camera and 2-megapixel front-facing cam. It will also come with Android 4.2.2 Jelly Bean.