Until now, Republic has not supported RCS, opting for the less secure SMS. Recent hacks have come to light exposing the risk of SMS. Google created it’s own version of RCS rather than adopting the ones currently that are standard. It looks like from this article, carriers will not have a choice?
From a recent article in Google 9 to 5:
" Last month, Google unveiled plans to bring RCS to all Android phones in the United States, scheduled to roll out over the following weeks. Today, a new update to Carrier Services seems to immediately enable RCS on some Android devices, including Google Pixel phones.
Google’s ambitions with the Chat initiative for RCS to replace SMS around the world have been stymied by carriers both in the United States and abroad. Those carriers have been unwilling to put the effort into the new technology in a reasonable amount of time.
Starting with the UK and France, Google bypassed the carriers and brought RCS messaging to Android phones through the Google messages app. Not long after, Google formalized its plan to bypass United States mobile carriers in the same way, with the rollout to occur over the coming weeks.
This afternoon, an update arrived for the carrier services app, bringing it up to version 32.0.283645144. In our testing on multiple Google Pixel devices, installing this update immediately triggers the availability of RCS messaging via the Google Messages app. The latest update for Google Messages may also be required.
Once RCS messaging becomes available, you’ll be greeted by a prompt the next time you open Google Messages, letting you know “Messages just got better” and inviting you to try out the chat features."