Three have announced that they will be running a competition via its Twitter page tomorrow.

The competition, which will start sometime between 10am and 4pm , will give participants the chance to win one of 12 premium smartphones. The smartphones available to win include the Samsung Galaxy Nexus, Sony Ericsson Xperia Arc S and the Nokia Lumia 800.

In order to enter the competition you need to keep an eye on Three's Twitter page between 10am and 4pm on Wednesday 7th December.

The competition itself follows the classic card game "Pairs", where you have to match two cards.

However, this won't be any normal card game because the cards will feature pictures of mobiles. Users have to Tweet #Threepairs followed by the two cards they want to select. If the cards you select are a pair you win the mobile pictured on the cards!

Three offer some great mobile deals and its One Plan is the best value mobile tariff around. You can get the latest mobiles on the One Plan from £30 which gets you 2,000 minutes, 5,000 texts and unlimited mobile data.

You can visit the Three store by clicking here to check out all their latest deals.