An Ookla report comparing 86 operators in 22 markets says the Big Three US carriers aren’t ready for next‑gen AI experiences—mainly due to latency under load and weak upload performance. T‑Mobile leads in the US (median upload ~13.94 Mbps) ahead of Verizon (~13.43 Mbps) and AT&T (~9.0 Mbps), but no market hits the sub‑10 ms latency needed for AR/multimodal AI. Dealers should reframe “5G speed” into real-world AI use cases.