Lockscreen

[Sanket24]

There is no any home key for galaxy M21 but it is showing the following on lockscreen.

[asingla]

it must be referring to fingerprint sensor try again after cleaning it

[Albugoo]

may be

[meap]

I think the same

[_ashiquek]

Bro it's saying about the fingerprint scanner.

[dk1614032]

in every Samsung phones it's showing your phone is also in the list

[TarunChhabra]

Bro clean the display with cotton cloth properly and restart it. It also shows on my phone I use this methods and problem solved. Try it