Assurance Wireless is T-Mobile's Lifeline brand, offering free or low-cost service to households that qualify for the federal Lifeline program. It runs over T-Mobile's network.
The map displays predicted outdoor signal quality. Indoor signal, congestion, and roaming coverage aren't mapped. Each can matter in practice.
Cell coverage data for Assurance Wireless comes primarily from the May 2026 release of the FCC's Broadband Data Collection program (representing networks as of December 2025), supplemented with real-world measurements from large crowdsourcing projects.