Windows Phone 8 will have a presence on all four of the nation's largest carriers by next year, as Sprint has confirmed that it will be carrying handsets running Microsoft's new mobile operating system in 2013. The nation's third-largest carrier did not give specifics on when a Windows Phone 8 handset would be appearing on its network, but it did confirm that it will carry a 4G LTE-capable handset some time next year. The announcement means that Windows Phone 8 will not make the holiday season on Sprint, even though Sprint executives said earlier in the year that they were "bullish" on the new