Do keypad commands originate from Android or the supplier?
I'm interested if keypad commands like those listed here originated from the Android OS or if they're included by suppliers. On my N1, I recognize of these 2 commands:
*#*#checkin#*#* - Phones residence to look for updates.
*#*#info#*#* - Enters a thorough phone details food selection.
There are several that appear to be "typical", yet they can additionally be included by specific applications (as an example carrier - mounted).
Look into http://forum.xda-developers.com/showthread.php?t=540483 for a method to extract telephone systems codes from your mounted applications.