Google chose RCS as the next holy grail of messaging after it shut down Allo and abandoned Hangouts. However, since the Rich Communication Services depend on the mercy of carriers and their specific device support, rollout has been exorbitantly slow, which even lead Google to take the reins and push out RCS in France and the UK using the Messages app (with more markets to follow). In the US, though, that's not the case so far. But perhaps Google calling the carriers' bluff is working, as Simple Mobile, Visible, and Xfinity Mobile are starting to support the new protocol.

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