Summary Bullets:

• AT&T, T-Mobile, and Verizon each improved in H1 2026, with distinct strengths across speed, reliability, and calls.

• Enterprises should evaluate 5G SA maturity, uplink capacity, and location-specific consistency—not just peak download speeds.

US mobile performance improved across the board in H1 2026, according to Ookla’s “State of the Mobile Union” reporting, drawing on RootMetrics testing. RootMetrics technicians ran over 3 million real-world tests from January to June 2026, driving 243,000 miles across all 50 states and 125 major metro markets to evaluate AT&T, T-Mobile and Verizon.

While each of the three carriers earned wins, the bigger story is that after more than half a decade, network investments are translating into more consistent, widely available 5G. That has direct consequences for mobile users and, especially, enterprises standardizing mobile connectivity for cloud apps, field operations, and AI-era workflows.

Key findings: shared speed leadership, different network strengths

AT&T earned five national RootScore Awards in H1 2026, including shares of awards for Overall Performance, Network Reliability, and Network Speed, and it won the US Call RootScore Award outright. The carrier also increased high-speed performance in cities, delivering median download speeds of at least 200 Mbps in 110 markets, up from 92 in H2 2025.

T-Mobile shared the national Network Speed award with AT&T and again led in 5G availability, posting 96.1%. It recorded 200+ Mbps median downloads in 123 of 125 major cities tested and took the most State Speed RootScore Awards (38)—demonstrating its strength in broad 5G reach and metro-area throughput.

Verizon earned the most awards overall across geographies, winning or sharing six national awards and leading with 321 State RootScore Awards and 756 Metro Area RootScore Awards. Verizon also won Best 5G Experience and Most Reliable 5G, and improved the number of major cities with 200+ Mbps median downloads from 104 in H2 2025 to 123 in H1 2026.

Verizon tops 5G experience, narrows gap on availability

In its 5G experience testing, RootMetrics cited strong performance for Verizon in both urban and rural testing. While it still trailed T-Mobile’s 5G availability, Verizon improved meaningfully—rising from 80.2% in H2 2025 to 89% in H1 2026. For users, that translates into fewer drops back to LTE and more predictable performance for video calls, collaboration tools, and cloud applications.

Performance gains are tied to spectrum and 5G architecture choices

In its report, Ookla researcher Mike Dano points to heavy carrier spending—such as AT&T’s spectrum deal with EchoStar, T-Mobile’s UScellular asset purchase, and Verizon’s AWS-3 auction activity—as a major driver behind improved outcomes. RootMetrics data indicates that overall mobile speeds on an aggregated nationwide basis increased from about 192 Mbps (H1 2024) to 334 Mbps (H1 2026), while the share of download tests running on 5G (SA or NSA) rose from about 84% to 93%.

Despite joint wins, each carrier is taking a distinct path

• AT&T is expanding mid-band capacity (including wider mid-band channel usage) and shows strong spectral efficiency. However, it continues to rely heavily on 5G NSA and, for some “lite data” tasks, leans on LTE more than rivals—potentially impacting responsiveness even when top-line speeds are improving.

• T-Mobile continues refining its extensive 5G SA footprint and leverages very large bandwidth in metro areas (often 200+ MHz total). It is also experimenting with additional spectrum layers in some markets and highlighting resilience efforts like satellite-based texting outside coverage, though usage in RootMetrics observations remained limited.

• Verizon is rapidly shifting toward 5G SA in metro testing and expanding C-band use while adding capacity features like more advanced carrier aggregation—including uplink improvements that matter as mobile use cases become more upload-heavy (video, telemetry, AI-driven apps). RootMetrics also noted some Voice over New Radio (VoNR)-related growing pains affecting call performance.
What it means for enterprises

For enterprise buyers, the report reinforces that “fastest” is less important than the best fit-to-use-case. Field service and logistics teams may prioritize coverage and 5G availability; headquarters and dense office environments may prioritize capacity and consistency; and organizations adopting real-time analytics, video, and AI workflows should pay closer attention to uplink performance and 5G SA maturity.

The bottom line is that US mobile networks are improving quickly, but in different ways. Enterprises should validate carrier performance where employees actually work—by region, indoor/outdoor mix, and application type—because competitive differences are increasingly about consistency of experience, architecture (SA vs. NSA), and how well each network handles the workloads businesses are transitioning to mobile.

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