mmWave 5G Performance in the U.S.: Ultra-Fast Speeds, Limited Reach Drive Strategic Deployments

The performance of mmWave 5G networks in the United States continues to stand out as one of the most compelling aspects of next-generation connectivity. While mid-band spectrum has become the backbone of nationwide 5G coverage, mmWave remains the technology’s high-performance layer, delivering exceptional speeds in dense urban environments and high-traffic venues. Verizon Leads mmWave Performance and Availability The evolution of mmWave 5G in the U.S. is largely driven by Verizon, which has built the most extensive high-band network footprint. The operator’s early acquisition of Straight Path and aggressive spectrum investments have translated into measurable performance advantages. mmwave download speed 2025 RootMetrics testing highlights that Verizon’s mmWave presence expanded significantly, with availability increasing from 75 metropolitan markets in early 2024 to 91 markets by the second half of 2025. In comparison, AT&T trails with deployments in far fewer markets, while T-Mobile has largely deprioritized mmWave. Despite this expansion, mmWave still represents a small fraction of overall network usage. It appeared in 2.2 percent of Verizon’s test samples, compared to just 0.2 percent for AT&T, underscoring its role as a targeted capacity solution rather than a broad coverage layer, Ooka said in its report . Exceptional Speeds Surpassing 1 Gbps The defining strength of mmWave 5G lies in its performance. With access to massive spectrum bandwidth – often up to 800 MHz – operators can deliver extremely high data rates. In real-world testing, mmWave connections frequently achieved download speeds exceeding 1 Gbps, far surpassing both low-band and mid-band 5G. These ultra-fast speeds make mmWave ideal for bandwidth-intensive use cases such as: Stadiums and large venues Dense downtown corridors Fixed wireless access (FWA) services High-capacity urban hotspots Both Verizon and AT&T benefit from wide channel allocations, though Verizon’s broader deployment and use of 28 GHz spectrum provide more consistent high-speed performance. Coverage Constraints Define User Experience While performance is unmatched, mmWave’s biggest limitation is coverage. Due to its high-frequency spectrum, signals have very short propagation ranges and limited ability to penetrate buildings. Most mmWave connections occur within 150 meters of a transmission site, and signals rarely extend beyond 900 meters. This sharply contrasts with mid-band spectrum, which can