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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.

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+1 because for making me aware about keypad commands. –  Silent Warrior Sep 19 '10 at 7:37
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3 Answers

up vote 2 down vote accepted

There are many that seem to be "standard", but they can also be added by individual applications (e.g. provider-installed).

Check out http://forum.xda-developers.com/showthread.php?t=540483 for a method to extract telephony codes from your installed apps.

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Very nice. Thank you! So the real answer is the codes come from APKs, which will vary by device. –  Josh Sep 29 '10 at 14:21
    
Yup, you got it! –  Farray Sep 29 '10 at 19:39
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I entered ##info## on my Captivate and got to the same menu.

So, in the interest of adding to the list

*#*#1472365#*#* gets you to the GPS configuration menu (not sure what word that works out to)

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No, *#*#1472365#*#* doesn't work on the Nexus One –  keyboardsurfer Sep 20 '10 at 21:13
    
So that leads me to think the commands come from the manufacturer? HTC has different commands than Samsung? –  Josh Sep 20 '10 at 21:25
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It's android based, I tried same commands on Moto Droid and HTC myTouch, both worked exactly the same.

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Did you try the #*#1472365#*# command that Dr.Dredel mentioned? –  Josh Sep 27 '10 at 14:45
    
Yup, doesn't work on myTouch. I don't have the Moto Droid on me so I can't try it. I guess that's not android default?? –  Muhammad Sep 28 '10 at 7:51
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