Google says that RCS is a feature of all Android phones. I have a NokiaCO2 with Android 12, that shows a message 'RCS is not available on this device'. An older Samsung with Android 7 had been giving me RCS, but that stopped on about August 1. I do my texting from a PC, through Google's Messages for Web, in which I had maybe a dozen contacts with whom I could exchange RCS messages - but no longer. In the text bar it used to show 'RCS', but now only 'SMS'. I have one remaining contact which still prompts 'RCS', but I expect that if I actually TRY to send a message, that will change to SMS, just like the other dozen contacts. In a practical sense I know RCS enables 'rich text' to be exchanged - and that requires Data or WiFi. My SIM 'plan' has minimal DATA. I can no longer exchange images or emojs or URLs which is a great loss, yet the phone is still connected to my WiFi. I'm very confused, and annoyed and inconvenienced and am hoping someone can make sense of this mess and tell me how to restore the earlier RCS functionality. Can it be related to the phasing out of 3G ?