Supermarket chain Tesco has announced that it will soon offer the iPhone 3G and iPhone 3GS in its stores through its Tesco Mobile brand, making it the fourth U.K. carrier to sell the device. BBC News reports that a Tesco spokesperson said the company hopes to offer the phone “in time for Christmas,” which would put its roll out ahead of Vodafone’s, which isn’t expected until early next year. Tesco Mobile is a joint venture between the supermarket firm and O2, and offers phones both on contact and on a pay as you go basis from its stores around the U.K.