The FCC announced today (via Engadget) that one or more major U.S. carriers submitted incorrect coverage maps, violating mapping rules pertaining to the Mobility Fund Phase II (MF-II) reverse auction. The Fund is expected to allocate over $4.53 billion over the next ten years to provide high-speed mobile broadband service to rural areas that wouldn’t have it without government support. The regulatory agency is investigating. Nearly 21 million speed tests from 37 states prove the inaccuracies of some of the maps. The issue is whether Verizon, AT&T, T-Mobile and Sprint exaggerated their LTE coverage in order to prevent rural carriers from receiving money from the Mobility Fund. These rural carriers would benefit from “dead spots” where none of the major wireless providers carry an LTE signal.