Samsung has been developing the new Bada OS targeted at smartphones and feature phones. The first phone with Bada OS is the Wave GT-S8500.
As with Symbian S40/S60 and other mobile OS, Bada has a few codes to turn on/off options and show advanced information that is not shown otherwise.
*#0*# – Test LCD screen
*#0673# OR *#0289# – Melody test
*#0842# – Test vibration
*#526# – Wi-Fi test
*#0228# – Phone battery information
*#7465625# – Network lock status (if any)
*#197328640# – Service mode
*2767*3855# – Factory format
Use the last one with care, because it restores your phone completely, and the process cannot be stopped by pressing power key or anything similar.