Recently, Google has quietly introduced a way to de-register your phone number from RCS messaging. Google currently all Android messaging over RCS which lets users send messages over the internet rather than the short message service (SMS). RCS allows for read receipts, full-res image sharing, and typing notifications for both individual and group chat threads.
Google’s new page offers instruction on how to turn off the “Chat features”, which effectively turns off RCS chat. The page suggests that you can turn chat features off if you are missing messages before switching to a new Android phone or switching completely to iMessage on an iPhone.
However, in the event that you don’t have access to the old phone because it was lost or stolen, or if you forgot to turn off chat features before trading a device in, you can now fill out a form online and manually turn off chat features.
All you need to do is enter a phone number associated with the chat features and enter a one-time-code that will be sent to your phone number via SMS. Of course, you’ll need to still have access to receive SMS on your phone number.