Engadget reports that AT&T has filed suit against Verizon over recent Verizon ads touting its national 3G network by comparing its coverage to AT&T’s 3G network using the iPhone-inspired tagline “There’s a map for that.” The complaint requests an injunction preventing Verizon from depicting non-3G coverage areas in AT&T’s network as “blank” spaces on maps in its advertising, as well monetary damages suffered by AT&T due to the advertising campaign.