Hacker News new | past | comments | ask | show | jobs | submit login

They're GSM feature codes - implemented features vary from carrier to carrier, but there are lists of commands here:

http://www.stereo.org.ua/2007/gsm-codes/ http://www.arcx.com/sites/GsmFeatures.htm

There are additionally model specific codes for hardware diagnostics (rather than interacting with the network) on a model-by-model basis.




Yes - on my network, Vodafone UK, these are the ones I can remember off the top of my head:

  *#1345# - gives you your credit balance if you're on a prepaid account
  *#100# - your phone number
  *#101# - the current network date and time
  *#[102-105]# - various network engineering information that I can't understand.
You can also, as long as you're on original GSM and not 3G, use the 'cell broadcast' feature to make it show you the current area code you're in (or more accurately, that your current tower is in). This is a throwback to an ancient price plan which gave cheaper calls to your local area. It's very much deprecated, so some newer cells don't broadcast the area code info, and no 3G cells do so.




Consider applying for YC's Spring batch! Applications are open till Feb 11.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: