*#30X#, where X=1..9 - generate fake incoming call; the phone will become kind of messed up, thinking that it's on a call until you restart. Can be used to stream music to Bluetooth headset.
This is either carrier or OS dependent: it never worked on my 3GS that I use in Italy. --Ryccardo 15:36, 1 December 2010 (UTC)
- The page as it is now was last updated in 2008, there was certainly no 3GS back then. It worked on my 2G running 2.X at the time. If you could test other codes and update the page accordingly, it would be greatly appreciated. --Blackbox 16:40, 1 December 2010 (UTC)