Let’s see, you wrote “RCS is not implemented by any carriers at all.”
I provided a link from the organization itself that shows it‘s implemented all over the world by scores of carriers as of 2yr ago. Others on this thread have trotted out false information about carriers (SK Telekom) dropping support but their information was way outdated and was regarding an old “Joyn” release of RCS. There have been at least 5 releases:
https://www.gsma.com/futurenetworks...ng-operators-at-the-center-of-communications/
Where‘s your evidence that any of these 90 carriers have dropped RCS support since June, 2020?
What people are missing here is that there are a lot of similarities between SMS and RCS. It’s just that RCS is beginning where SMS is ending (in the US), with only one or two providers for the backend.
”AT&T, T-Mobile, and Sprint currently use Syniverse to route text messages to people on other networks, according to data available to Tyntec, a smaller messaging services company that spoke with
The Verge. Verizon confirmed that it uses a competitor, SAP.
With those three carriers as customers, Syniverse is responsible for delivering 600 billion messages every month.
But if an AT&T customer wants to send a message to a Sprint customer, a third-party company needs to take on the work of
translating AT&T’s message into Sprint’s protocol, and physically routing it from one network to the other. And thanks to some canny buyouts and years of ruthless competition, the vast majority of that work is now done by Syniverse.”
Syniverse is too important to back away from.
www.theverge.com