Set Google Messages as the default app, wait for it to fully register, then switch back to Samsung Messages.
Once deregistered, do not attempt to register on your phone immediately. Wait at least 8 to 24 hours for the servers to completely clear your number's profile. samsung.com 📲 Method 2: The Google-to-Samsung Handshake samsung messages chat registration failed fixed
If Samsung Messages shows “Chat registration failed” when sending or receiving RCS (chat) messages, follow these steps to restore functionality. These instructions assume an Android phone with Samsung Messages and a carrier that supports RCS. Set Google Messages as the default app, wait
If you recently switched from Google Messages back to Samsung Messages, your number might still be "active" on Google's end, causing a conflict. Go to the official Google RCS de-registration page . wait for it to fully register