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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 11 | One UI 3.0
Step 1: Tap on  Settings
Step 2: Tap on  Connections
Step 3: Tap on  SIM card manager
Step 4: Turn On/Off a  SIM card
Step 5: Tap on  OK
  1. Tap on Settings
  2. Tap on Connections
  3. Tap on SIM card manager
  4. Turn On/Off a SIM card
  5. Tap on OK
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Samsung Instructions