How to turn off RCS

[stuck74]

I just want to change my texting to regular sma and I don't know how 

...idk if I'm in a group thing or not and it's making me crazy I want to factory reset but don't know how to keep certain things .. I it's truly make me insane 

[KnightRiderRalph]

Are you using Google Messages?

[Shadowfalx · Accepted solution]

It's RCS (Rich Communication System) and you can turn it off by following the below steps:

https://www.messagedesk.com/blog/rich-communication-services-rcs

How to turn off RCS messaging on Android
Open the Messages app on your Android device.
Select the three-dot menu or your profile icon.
Go to Settings.
Tap Chat features.
Set Enable chat features to off.
In the pop-up window, tap Turn off.
Chat features are now disabled on your device, and you're removed from existing RCS chat groups.

If you don't mind, can you explain why you don't like RCS? Most people seem to prefer it, if they notice it at all.