AT&T has the fastest LTE performance among U.S. networks, according new data published by RootMetrics, an independent mobile analytics firm. The report is based on more than 725,000 4G and 4G LTE data samples gathered from the top 77 U.S. markets during the second half of 2012.
Some key findings:
- AT&T's LTE-only achieved 18.6 Mbps average downloads (57.7 Mbps max) and 9.0 Mbps average upload (19.6 Mbps max).
- Verizon's LTE-only achieved 14.3 Mbps average downloads (49.3 Mbps max) and 8.5 Mbps average upload (19.7 Mbps max).
- Sprint's LTE-only achieved 10.3 Mbps average downloads (32.7 Mbps max) and 4.4 Mbps average upload (9.9 Mbps max).
- T-Mobile USA's HSPA+42 service achieved 7.3 Mbps average downloads and 1.5 Mbps average upload (9.9 Mbps max).
RootMetrics notes that Verizon commands the most extensive footprint and the best chance of connecting to LTE in markets that LTE-ready.