While Verizon looks strongest around major cities, California and the East Coast, AT&T looks better in the Upper Midwest and South. T-Mobile’s coverage is spread evenly around the map, with gaps ...

HONOLULU (KHNL) -- AT&T wireless customers will soon get more cell phone service in Hawaii. AT&T Inc., plans to invest more than $25 million in network upgrades in the Hawaiian Islands by the end ...