I compared Verizon, T-Mobile, and AT&T 5G coverage on a road trip - and the winner surprised me

A ZDNET reviewer conducted a 13-hour Chicago–Nashville road trip testing 5G coverage and speeds across AT&T, Verizon, and T-Mobile using multiple phones and the nPerf app, with hourly speed tests at interstate stops. Results showed generally strong coverage and high speeds along interstates, with T-Mobile delivering the most extensive 5G (both SA and NSA) and overall 96.2% coverage, while Verizon produced peak speeds near 4 Gbps in Louisville. The report notes carriers likely prioritize interstates and busy stops, so rural backroads may differ, but overall travelers can expect reliable connectivity for typical use and calling for help.