Comparing 5G Network Coverage: Verizon, T-Mobile, and AT&T on a Road Trip

When 5G technology was introduced, it came with promises of handling large capacities and improving coverage beyond urban areas. These were certainly claims worth exploring during a long drive from Chicago to Nashville.

Methodology

Equipped with Google Pixel 10 Pros, each using an eSIM from Verizon, T-Mobile, and AT&T, I ventured out to evaluate not just speed, but overall coverage on American highways. These devices were connected to an Anker Solix power source and employed the nPerf app to measure signal quality at intervals, capturing over 120,000 data points.

Additionally, hourly stops were made to run speed tests using an iPhone 17, ensuring consistent conditions for each network. This extensive dataset revealed both expected and surprising findings.

Findings

Network speeds significantly exceeded single-digit figures in most locations, with occasional dips. Coverage focused on areas where travelers typically pause, such as rest stops, which reflect logical spots for network infrastructure to cater to high traffic. The aim was to challenge connectivity throughout the journey, which nPerf facilitated by collecting comprehensive metrics.

5G Network Architectures: Standalone vs. Non-standalone

A notable discovery was the variation in network structures—only T-Mobile implemented non-standalone 5G, which leverages existing 4G systems to support connectivity. Although economically set up, these structures may incur higher latency, although negligible in daily tasks. However, lower latency becomes vital in gaming or remote applications.

While standalone (SA) 5G promises a more future-proof setup, current data paints a picture of where different carriers stand in their rollout journeys.

Overall Performance

T-Mobile delivered impressive reach, covering a significant expanse with its 5G network. While all carriers exhibited strong signal strength over most of the journey, T-Mobile's coverage was unrivaled at nearly 96% of the trip. Verizon and AT&T offered substantial, though less extensive, 5G experiences.

Remarkable network speeds were recorded, including a standout performance by Verizon in Louisville, with download speeds nearing 4GBps.

Concluding Thoughts

Interstate travel unduly focuses network construction efforts due to higher traffic volumes. Moving forward, exploring less congested rural roads is necessary to fully understand 5G's reach. Current assessments assure robust network development, aimed at providing reliable connectivity, even in less urbanized locales.