For radios whose Serial Number begins with an "M", followed by a six digit number, you can use the following link to work out what your Keycode should be:

www.pumapeople.com/decode.php

Well, the Puma People calculator should have given you a keycode of 1578.

I take it this is the code that didn't work? In that case the serial number must be incorrect, assuming, of course, that you have entered the code correctly.

How did you get your serial number?

Edited by Galaxy on 23/10/2015 at 15:25