Claims that AT&T will outperform T-Mobile in 2026 will spark “which carrier is best?” conversations in stores. Dealers win by avoiding carrier-war arguments and running a Coverage-First Fit Check: where the customer lives/works, what they do most (streaming, hotspot, calls), and what their steady-state monthly total will be after promos/credits. Then close with a Switcher Readiness checklist (unlock + port info) and a No‑Surprises Summary in writing.