There are Bluetooth devices, such as car radios or laptop PCs, that can be given permission to access the OnePlus smartphone's stored contacts to process its information.
This includes, for example, calling via a voice command in the car.

Access to the contacts can be granted and denied at any time.

Android 10 (OxygenOS 10.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Bluetooth & device connection
Step 3:  Tap on  Bluetooth
Step 4:  Open the device´s  settings
Step 5:  Enable or disable  Contact sharing
  1. Open the Settings
  2. Tap on Bluetooth & device connection
  3. Tap on Bluetooth
  4. Open the device´s settings
  5. Enable or disable Contact sharing

OnePlus Instructions
Loading...

Transmitting...