Depending on the provider, the chat functions of the Messages app on the OnePlus smartphone can be used, which are similar to messenger functions and send and receive messages via the mobile data or a connected wireless network.

This includes, for example, the display on the chat partner's device whether we are currently writing a text or not.

If desired, the chat features can be turned on/off at any time.

Android 10 | OxygenOS 10.0
Chat features -  Open the  Messages app
Chat features -  Open the  menu
Chat features -  Open the  Settings
Chat features -  Tap on  Chat features
Chat features -  Enable or disable  chat features
  1. Open the Messages app
  2. Open the menu
  3. Open the Settings
  4. Tap on Chat features
  5. Enable or disable chat features

OnePlus Instructions