AT&T has started doubling the data capacity of its 3G markets, and nearly half of all cell sites will receive additional 3G capacity by the end of the year. The additional capacity will help accommodate the anticipated growth of 3G subscribers over the next several years.

Between 2005 and 2008, AT&T will have invested more than $20 billion in network improvements and upgrades – an average of $5 billion a year. Much of this network investment has gone to build out the 3G broadband data network, which today is available in 296 major metropolitan markets. In addition, the company is deploying additional 3G coverage using 850 megahertz (MHz) spectrum that is now available from the recent sunset of its older TDMA network. This spectrum extends farther and better covers the interior of buildings.