In order to display personalized advertising, every Oppo smartphone has a unique Advertising ID. Personalized data about the Advertising ID is stored based on usage and surfing behavior. The Advertising ID can either be recreated or deactivated completely. In the latter case, the Advertising ID is no longer sent to advertisers. Advertising is still displayed, but no longer personalized.

Android 10 (ColorOS 7.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Security
Step 3:  Tap on  Device ID & ads
Step 4:  Enable or Disable  Limit ad tracking
  1. Open the Settings
  2. Tap on Security
  3. Tap on Device ID & ads
  4. Enable or Disable Limit ad tracking

Oppo Instructions
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