Instructions to pin screen on DND devices

How to protect your privacy when lending a DND smartphone or tablet to someone else. Instructions for setting up "screen pinning" on a DND brand device. Block an application on the screen from which the user will not be able to exit without knowing the unlock pin, in this way you will prevent them from seeing your messages, photos and private data that you do not want to show.

DND B1000 DND B1000
DND Predator G980S Neo DND Predator G980S Neo
DND N9000 DND N9000
DND N9500S Octa-S DND N9500S Octa-S
DND Predator G900S DND Predator G900S
DND Mini N9000 DND Mini N9000
DND N9000 Octa S DND N9000 Octa S
DND N9500 DND N9500
DND Raptor N900M DND Raptor N900M
DND Predator G980S DND Predator G980S
DND Snap G900S DND Snap G900S
DND N9500S DND N9500S