Dual Messenger

Samsung's user interface One UI allows its users to install supported messengers twice. Dual Messenger, for example, installs WhatsApp or Facebook a second time, allowing two different accounts to be used. This makes sense especially when a dual-SIM-enabled Samsung device is present. If desired, the contact lists can even be kept separate.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Advanced features
Step 3:  Tap on  Dual Messenger
Step 4:  Enable the desired  App
Step 5:  Tap on  Install
  1. Open the Settings
  2. Tap on Advanced features
  3. Tap on Dual Messenger
  4. Enable the desired App
  5. Tap on Install