Well, you need to call your Network, ex: AT&T, Sprint, T-Mobile ect. Or, you can go to your Networks store and see if they can either reset your password, and tell you your old one, or you can have them remove it completely. Hope this helps!!
I have a samsung a717 and I turned it on and it says phone lock password and I don't know my password so what do I do?
Well you need to call and see I they will fix it for you