Settings I should've changed on day one.
Open Google Messages → profile icon → Messages settings → RCS chats → turn off “RCS chats.” Wait a full 5 minutes (not 30 seconds — the deregistration needs time to propagate to Google’s servers).
Samsung Messages will cease to work for some Galaxy phone users in the US in July. Here's why, and how you can transfer your conversations from Samsung Messages to Google Messages.
The Google Messages app might get a new “Details” button in the RCS settings page. Tapping this button will show details, like the status code, device ID, and carrier, needed to diagnose the RCS issue ...
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