There are a lot of different keypad commands in Android. What are the known ones? Some of them are listed here : *#*#checkin#*#*: Phones home to check for updates. *#*#info#*#*: Enters a detailed phone information menu. *#*#1472365#*#*: Access to the GPS config menu (useful for patching Galaxy S GPS failure)

I'm curious if keypad commands like those listed below come from the Android OS or if they're added by manufacturers. On my N1, I know of these two commands: *#*#checkin#*#* - Phones home to check for updates. *#*#info#*#* - Enters a detailed phone information menu.