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Enabling the "Lock network and security" function on the Samsung device prevents the mobile data and Wi-Fi connection from being disabled when the smartphone is locked.

In case of loss, the "Find My Mobile" function uses these connections to be able to locate and control the device.

Android 11 | One UI 3.0
Step 1: Tap on  Settings
Step 2: Tap on  Lock screen
Step 3: Tap on  Secure lock settings
Step 4: Enter the current  Pattern ,  PIN  or  Password
Step 5: Enable or disable  Lock network and security
  1. Tap on Settings
  2. Tap on Lock screen
  3. Tap on Secure lock settings
  4. Enter the current Pattern, PIN or Password
  5. Enable or disable Lock network and security
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Samsung Instructions