Android codes - use at your own risk

[Fudzy]

Some useful ones, others might make you a sad panda:

*#*#4636#*#*
This code can be used to get some interesting information about your phone and battery. It shows following 4 menus on screen:
Phone information
Battery information
Battery history
Usage statistics

http://www.nexusoneforum.net/forum/nexus-one-general-discussion/6272-google-android-phone-codes.html