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How RCS on iPhone Will Make Texting Better for Everyone
(www.cnet.com)
This is a most excellent place for technology news and articles.
yes I know Apple isn't a Telecoms company but you need a SIM from a Telecoms company to use iMessage. RCS runs over the Internet too, yet you also need a SIM card for that. Also Telecoms companies aren't designing message protocols anymore. I don't think you know what you're talking about.
iMessage can also run over e-mail.
And RCS was designed by the GSMA which is effectively a bunch if telecommunications companies.