Thanks to Smart Lock, we can automatically unlock the Oppo smartphone as soon as it connects to a trusted device, which can be a SmartWatch, fitness tracker, car handsfree or simply headphones/headsets, but the connection must be made via Bluetooth.

If the device is connected, and the device is set as a trusted device, the Oppo Smartphone will remain unlocked during this time.

Note: The device must already be paired successfully before it can be added.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Security
Step 3:  Tap on  Smart Lock
Step 4:  Enter your current  Password/PIN/Pattern
Step 5:  Tap on  Trusted devices
Step 6:  Tap on  Add Trusted Device
Step 7:  Choose desired  Device
Step 8:  Confirm with  Yes, Add
  1. Open the Settings
  2. Tap on Security
  3. Tap on Smart Lock
  4. Enter your current Password/PIN/Pattern
  5. Tap on Trusted devices
  6. Tap on Add Trusted Device
  7. Choose desired Device
  8. Confirm with Yes, Add

Oppo Instructions