**ignore saw you have redmi not note**
did you try the fastboot method i linked previously?
http://en.miui.com/thread-235865-1-1.html
I did it this way and it took about 15 minutes. mine was a sealed box so i was starting from the official chinese rom. check what rom you starting with as that can cause issues if the reseller flashed a rom on to it.
did yours come with google play store?