San Francisco: AT&T Uses Home Field Advantage
AT&T finished on top in the City by the Bay, and it had stellar results from AT&T Park to thank for the victory. AT&T recorded an overall download average of 46.6 Mbps in San Francisco, far ahead of Verizon's runner-up average of 27.5 Mbps. AT&T finished second in upload average, with its 14.8 Mbps speed trailing only Cricket's 15.3 Mbps average.
But AT&T's numbers got a big boost from our test at the San Francisco baseball stadium that bears the carrier's name. Outside of AT&T Park, AT&T recorded average download speeds of 134.5 Mbps. That dwarfs the 34.74 Mbps speed runner-up T-Mobile recorded at the ballpark. Remove that one test site from the mix, and AT&T's overall download speed would be 29.1 Mbps in San Francisco — still solid, though now behind Verizon's 30.7 Mbps average.
Still, an edge is an edge, and AT&T exploited the home field advantage at AT&T Park to its fullest. Even so, Verizon topped our app download test, taking 1 minute and 7 seconds to download Pokémon Go. AT&T's 1:44 average was the next fastest time.
San Francisco provided another instance where T-Mobile and Sprint struggled indoors. T-Mobile averaged 17.5 Mbps in download speeds at our outdoor test sites, but that average fell to 5.3 Mbps when we moved indoors. Sprint's download speeds went from 15.4 Mbps outdoors to 2.8 Mbps indoors, with the underground Civic Center MUNI station proving particularly problematic for the carrier.