-Ad-RCS in Google Messages has suddenly stopped working for some users worldwide, with the app now showing the “RCS chats are not supported by your carrier” error even for carriers where it worked just days ago. This is strange because dual-SIM RCS on Google Messages had been working perfectly for me for months. Even the Google Messages Community forum is buzzing with similar reports. Many long-time users mention that their carriers never officially supported RCS but Google’s Jibe platform made it work seamlessly anyway, until now. Support even offered a troubleshooting checklist involving Airplane Mode, clearing Carrier Services and Google Messages data, and force-stopping both but, according to that user, it didn’t work.