MacRumors reports that T-Mobile shut down its 2G GSM network on Monday, August 3, making it the last major U.S. carrier to retire 2G service and leaving the original iPhone without access to any cellular networks.
The practical takeaway for builders is that any device or IoT integration still depending on 2G fallback is now effectively dead in the US, so audit any hardware or connectivity assumptions in your stack. If you ship apps that assume a floor of legacy connectivity for edge cases, that floor just moved up. Mostly a cleanup signal rather than an urgent one, but worth checking whether any low-power or fallback SMS paths you rely on route through retired bands.
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