Sony Ericsson has teased a new mobile device on its Facebook page in an attempt to whet people's appetites before the big consumer show in Las Vegas.

There isn't much to go on in terms of what device we can expect, but the main rumour so far seems to be in the form of the Xperia Arc HD "Nozomi"; a device that may well be packing a 4.3-inch, 720p display and powered by a 1.5GHz dual-core chip set and 1GB of RAM. Not only this, but Full HD video recording and a 12-megapixel snapper might be on the cards.

However, there is another, rather outlandish possibility. On inspection of the carefully arranged teaser photo it looks like it might be a Windows Phone 7 device as there is a definite tiled theme to the pic, this theme also being picked up by WPCentral. As well as this, some very familiar colours were noticed by WMPoweruser; sported by each of the four individuals they match the Windows Phone colours.

Of course we may turn out to be completely wrong, but it's not as though Sony Ericsson are completely new to the Windows Phone OS, having previously dabbled with handsets such as the Xperia X1 and X2.

Bring on CES 2012, when all will be revealed.

UPDATE: Sony Ericsson has teased with yet another picture focusing on the camera elements of the new device. It also shows a HD logo underneath the camera suggesting it could be the Arc HD.