Simple Mobile is owned by Verizon and runs over the Verizon 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 Simple Mobile comes primarily from the October 2026 release of the FCC's Broadband Data Collection program (representing networks as of June 2026), supplemented with real-world measurements from large crowdsourcing projects.