Good lock?

[Anil07]

Can anyone tell me how can I download good lock unofficial on my galaxy a21s device...?

[souravKhan]

Rooting your device is the one & only method to install Good Lock which I don't recommend.

[Jasirmd72]

https://r2.community.samsung.com/t5/Galaxy-A/Good-Lock/td-p/7392469

I had asked this same question previously, check out the solutions