To Hard reset samsung galaxy #A11 A20 A30 A50 A10e A10s
1- At first push Volume Down and Power buttons for a couple of seconds
2- When the screen goes dark hold down Volume Up and Power key for a few seconds
3 – Release all buttons if the SAMSUNG Galaxy logo shows up
4 – Then select Wipe data/factory reset by using Volume keys to navigate and the Power button to confirm
5 – After that choose Factory data reset by using same keys as before
6 – Finally select Reboot system now with the Power key
celltechinfo.com 