i have the SIM serial# on my box but that has an F in it. what is the code to the F?

when i register other serial numbers, it is unresponsive and goes back to the "home" screen with the demo.

is there another code?
anyone know what i'm doing wrong?

its t-mobile pay as you go service by the way

thanks for the help in advance.


See More: Nokia 1280 SET UP HELP!!!