press vol down at power button to enter fastboot mode mga 10sec ang press bago makapasok
ito na yong fastboot mode samsung ang lalabas na brand
<a href='https://postimg.org/image/t6x1919xp/' target='_blank'><img src='https://s14.postimg.org/40w3278nl/Skk_A21_2.jpg' border='0' alt='Skk_A21_2'/></a>.
oper ARZ tool 2k17
select MI unlocker tool
select Android Pin/Pass Remove(fastboot)
and tick start at insert usb
<a href='https://postimages.org/' target='_blank'><img src='https://s14.postimg.org/4260vhsg1/Skk_A21.png' border='0' alt='Skk_A21'/></a>
done na sya
<a href='https://postimg.org/image/54g7e9o6l/' target='_blank'><img src='https://s14.postimg.org/lfgbal0oh/Skk_A21_1.jpg' border='0' alt='Skk_A21_1'/></a>
ito na yong fastboot mode samsung ang lalabas na brand
<a href='https://postimg.org/image/t6x1919xp/' target='_blank'><img src='https://s14.postimg.org/40w3278nl/Skk_A21_2.jpg' border='0' alt='Skk_A21_2'/></a>.
oper ARZ tool 2k17
select MI unlocker tool
select Android Pin/Pass Remove(fastboot)
and tick start at insert usb
<a href='https://postimages.org/' target='_blank'><img src='https://s14.postimg.org/4260vhsg1/Skk_A21.png' border='0' alt='Skk_A21'/></a>
done na sya
<a href='https://postimg.org/image/54g7e9o6l/' target='_blank'><img src='https://s14.postimg.org/lfgbal0oh/Skk_A21_1.jpg' border='0' alt='Skk_A21_1'/></a>