Excellent. The next step is for Google to release a free and open source way for Android developers to build apps that send RCS messages. Currently, the only messaging app on Android that fully supports RCS is Messages by Google, which is closed source and requires Google Play Services to activate RCS features.
Also, end-to-end encryption is not part of the RCS specification, but is a proprietary extension to RCS that Google has made exclusive to Messages by Google.[1] This feature should be made open and added to the actual RCS specification so that Apple and other vendors can make use of it.
(Notes: There is a proprietary RCS API which Google only allows Samsung apps to use to communicate with Messages by Google.[2] Verizon has an app called Verizon Messages or Message+ that uses RCS to some extent, but this is an incomplete implementation that only works on Samsung devices on the Verizon network with no cross-carrier compatibility.[3])
Also, end-to-end encryption is not part of the RCS specification, but is a proprietary extension to RCS that Google has made exclusive to Messages by Google.[1] This feature should be made open and added to the actual RCS specification so that Apple and other vendors can make use of it.
(Notes: There is a proprietary RCS API which Google only allows Samsung apps to use to communicate with Messages by Google.[2] Verizon has an app called Verizon Messages or Message+ that uses RCS to some extent, but this is an incomplete implementation that only works on Samsung devices on the Verizon network with no cross-carrier compatibility.[3])
[1] https://arstechnica.com/gadgets/2021/06/google-enables-end-t...
[2] https://www.xda-developers.com/google-messages-rcs-api-third...
[3] https://www.verizon.com/support/knowledge-base-222792/