These codes for the Nokia series of phones provide some interesting information for users, they also unlock some hidden functions. These codes are often reffered to as "Nokia Secret Codes" or "Nokia Hacks". Use the codes at your own risk, not all Nokia phones support all codes, I have tried to split them into these groups.
In the Philippines, the majority of the cell phone users here has a Nokia. I prefer Siemens though.
So Nokia users, Hack away my dears. Hack away.