For dual SIM devices, one or both SIM cards can be deactivated on the Samsung device, making the device unreachable under the phone number (the SIM card).

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Connections
Step 3:  Tap on  SIM card manager
Step 4:  Tap on  SIM 1 / SIM 2
Step 5:  Enable or disable the  SIM card
  1. Open the Settings
  2. Tap on Connections
  3. Tap on SIM card manager
  4. Tap on SIM 1/SIM 2
  5. Enable or disable the SIM card

Samsung Instructions
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