imageRecently , I had to delete all contacts on my father’s Samsung mobile and then it asked me for Phone Unlock code/password ,  now as this was a new phone I was a bit shocked at first as, how was I supposed to know it then as usual I googled it and here are the results.

The default Phone lock password required for carrying out mass delete operations or some administrative tasks on your phone is 00000000 ( eight consecutive zeroes).

but , incase you have already changed the phone lock code then you are sure in some jeopardy as then you need to give it to your nearest Samsung authorized service centre to get the password reset.