Format any samsung android phone.

Format samsung android device if you forgotten your password.
step 1.
To format your phone press volume button,power button & home button at same time.press it for 15 to 20 sec
step 2.
A screen will appear, then you have to choose wipe data/factory reset by useing volume
button (for up & down) & power button (choose).
step 3.
Then you choose yes -- delete all user data. wait for main menu.
step 4.
Then choose reboot system now

now you all done.

NOTE- I am not responsible for any problem,for doing this you have to know that
this is a process that clear all your data and information.