My question is that I want to know how or the procedures to decode phones.

Need more info. What do you mean decode it?

What kind of phone do you have and what do you want to do to it?

I want to de-code my Motorola Raza

Again... decode?

What do you want to do with it? Use it on another carrier? Just unlock it? Reprogram it? Switch it to the default firmware?

Need more info