AT&T today shined extra light on its plans to move to 4G. As part of an extended deal with Alcatel-Lucent and Ericsson to upgrade its network, every 3G cell site upgrade in 2010 will also be upgradable to the much faster Long Term Evolution (LTE) standard for 4G, whether it requires add-on hardware, new software or both. The move will let AT&T switch on 4G in these areas more quickly than it could if it had to completely replace the site.