HI, All For some request - the device wiping is needed. Seems, my code is working, but ... how to test ? The MEMU emulator does nothing. Android emulator, seems, requests SD-card re-formatting in the notification area. How to be sure that the full wipe is real ? Maybe anyone has real old device that can be reset to factory settings for test ? If you have, try, please: 1) compile and start the app, the project is attached. 2) set the app as the device owner: start the command manually by ADB "adb shell dpm set-device-owner b4a.wipexample/anywheresoftware.b4a.objects.AdminReceiver2" NOTE: this setting is forever (up to factory reset), cannot be unchecked in the Device Admin settings. NOTE2: do not set the app as default launcher.