How can i get good lock

[Tusherm0]

Hi, Good lock haven't in my region. Have there any way to install good lock? 

If have, please tell me how can i get it.

[_Sara_]

Install the substitute Fine Lock
https://play.google.com/store/apps/details?id=yuh.yuh.finelock

[samsungmatherchud]

I have a solution,,but find is enough for you maybe