The above named code will work on Most Nokia phones up to and including AT least the Nokia 6900 (last one I had the chance to test it on). Nokia uses fairly standardized internal access codes, so these codes do not change much or at all from one version of phone to the next. Happy cell hacking
I did try it on my Nokia 6185 also, but I know some codes work on some nokias and some dont.. But I know the Rogers AT&T 5165 has more options in it's system menu than the 5190, probably because of the GSM Technology and Fido's lack of experience and general knowledge of their own technology