Verizon's early 4G network push has given it at least the technical speed advantage on phones in the US, a US-wide field test shows. The LTE-based network is both the fastest overall across 21 cities as well as through individual regional tests. The carrier only loses in PCMag's study in tests for rural and mid-size areas, where the newness of Verizon's network gave AT&T's 3G the lead by default.