Supported Model: Samsung M40, Samsung M30, M20, M10, A10,A20,A30, A40,A50, A70, S10, S10+, Note 9, Note 9+
Requirments: Pin enable Sim card and wifi network connection.
- Connect your device to a wifi connection,
- Then insert a sim card,
- Put the pin lock first but don’t press ok button.
- Now press ok and drag down your finger up to down to bring notification bar (do it as first as you can).
if not working try and try again.
- Then click on the notification settings
Play the video for the procedure..
Credit to Gadgets Doctor