Hello and Welcome to FixYa!
First try for the default password that is 0000 or 00000.
If this doesn't work, then it means your default password has been changed, try to remember it. Otherwise we have a solution for free but for that we need the USB data Cable of your phone, that comes with a new phone in the box.
If you have it, then kindly navigate to
this link and follow the instruction carefully. I've personally done it a number of times with 100% success. So don't worry its curable.
If you have any Confusion, questions or issues regarding your problem do tell me.
Thank you for using FixYa!, Keep visiting..
If you think I was of help, your token of appreciation in the form of rating and a testimonial will be esteemed.
Concerned, Nooh