RCS ad spam worsens across all platforms and could be here to stay

Built to replace two aging standards, the Rich Communication Services protocol offers a massive functionality upgrade over old, tired SMS and MMS messages. Google Messages began supporting it at the end of 2019 and spent years feuding with Apple in an apparent attempt to encourage adoption. Since then, a bunch of carriers have tried and failed at their own implementations, the Universal Profile helped ensure interoperability, and Apple eventually caved.