Galaxy Note 2 Things You May Not Know Episode 8: 3 Secret Menus For Testing, Lcdtest, Self Test Mode

Here are some codes that work on my Samsung Galaxy Note 2
*#0*# General Test Mode LCDTest App
*#7353# Launches Hidden "Self Test Mode" App
*#06# Show IMEI number
*#0011# Displays status information for the GSM
*#1234# View SW Version PDA, CSC, MODEM
*#12580*369# SW & HW Info
*#0228# ADC Reading
*#9090#  Diagnostic Configuration
*#0283#  Audio Loopback Control
*#9900# System Dump Mode
*#07# Test History

Thanks to: hasibusi and Hussain K. for the codes.

I found a link with a big list of codes, but you will find most of the codes in this link below does not apply for the Note 2, but maybe I've missed some.  Practice caution for ones that say "Factory Reset" or "Firmware Update".
http://forum.xda-developers.com/showthread.php?t=1603210