[JAC]

The codes listed are for use by Engineers only, unless you know what you are doing.

This is in no way a dispute about your knowledge, but please only access these if you know what you really are doing.
The Engineer code is for accessing cell properties, call logs etc.
Similar to netmonitor, but different applications. They are used in conjunction with software from a PC, not from just the phone.

Its pretty vague to guess what all these codes do, but I would just stick to the ones you know *#06# etc.

Unless you want to kill your phone then enter them all, some will not work as it depends on your firmware on your phone.

Regards
JAC