AT&T has been expanding its 4G LTE coverage to new locations on a fairly regular basis, with the latest expansion covering six new locations in Michigan. This is following its expansions that rolled out last month in Los Angeles, Salt Lake City, and Phoenix, as well as the new markets in Green Bay, Springfield, and Tucson, among other places. In addition, AT&T has also boosted cell service in the Detroit Marriott Renaissance Center.
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