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On the Oppo smartphone, we can decide for outgoing calls whether our number should be displayed or suppressed. In the latter case, our number is not displayed to the caller, but "Unknown caller". We can display or suppress our caller ID under ColorOS in the phone settings.

Android 11 | ColorOS 11.0 | Google Phone
Step 1: Tap on  Phone
Step 2: Open the  Menu
Step 3: Tap on  Settings
Step 4: Tap on  Calling accounts
Step 5: Tap on  Carrier call settings
Step 6: Tap on  Additional settings
Step 7: Choose a  SIM card   (Dual SIM)
Step 8: Tap on  My Number
Step 9: Choose  Hide/Show Number
  1. Tap on Phone
  2. Open the Menu
  3. Tap on Settings
  4. Tap on Calling accounts
  5. Tap on Carrier call settings
  6. Tap on Additional settings
  7. Choose a SIM card (Dual SIM)
  8. Tap on My Number
  9. Choose Hide/Show Number
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Oppo Instructions
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