Walmart Family Mobile is a Verizon-owned prepaid brand sold through Walmart. New customers get Verizon's network, so the map above shows Verizon coverage. The brand started out on T-Mobile's network in 2010 and some long-time customers are still on T-Mobile SIMs, but that isn't offered to new signups.
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 Walmart Family Mobile 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.