Apple iPhone Smartphone "delite ask" Questions

i want defult password i have samsung x520 mobile it will ask password to delite my all contacts in phone Samsung default password is 00000000

i do not remember my password actually in message settings text message message center number i was deliting u can call to ur coustomer care and ask them for the massage center number

Default password for Samsung D900i Please help, my phone is a Samsung D900i, i want to delite all phone book enrties, the phone is asking for a pass word. What is the default password for my phone? ...