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If you have an Android phone, you might have an upgraded version of text messaging called "RCS." This is a massive upgrade over SMS, but it does come with some baggage. Here's how to deregister your number from RCS.

When switching from a device or messaging app that supports RCS to one that does not, you may experience issues with messages not being sent to the new device or app. This problem can last up to eight days after switching. A similar thing can happen with Apple's iMessage service.

Related: What is RCS, the Successor to SMS?

To avoid this, Google recommends that people turn off RCS before switching. However, if you didn't do that, and you're experiencing these issues, it's possible to disconnect your phone number from RCS after the fact.

How to Turn Off RCS

First, we'll show you how to turn off RCS while you still have the original device. RCS is only supported in first-party apps from Google, carriers, and phone makers. Google's Messages app works across all Android devices, so that's what we'll be using.

Open the Messages app on your Android smartphone and tap the three-dot menu icon in the top-right corner.

open messages and tap the menu icon

Next, select "Settings" from the menu.

select settings from the menu

Tap "Chat Features" at the top of the Settings.

select chat features

If you don't have RCS support, you won't see "Chat Features" listed in the Settings.

Now simply toggle the switch off for "Enable Chat Features."

toggle off chat features

That's it! You can now switch to the new device without having to worry about any more lost messages.

How to Disconnect Your Number from RCS

If you don't have access to the original device anymore, you can still deregister your phone number from RCS.

First, go to Google's deactivation web portal in a browser such as Chrome.

go to the deactivation page

Scroll to the bottom of the page to the "Without Your Previous Device" section. Enter your phone number in the top text box and click "Send Code."

enter phone number and send code

A text message with a six-digit code will be sent to your phone number. Enter that code into the second text box and click "Verify."

enter code and click verify

A message will appear saying, "Chat Features Have Been Turned Off." It may take a few minutes for the change to go into effect, but that's all there is to it.

"Chat" is the term Google uses for RCS features in the Messages app.