Samsung secret codes

Samsung - Service Codes
*#06# Show IMEI
*#9999# Show Software Version
*#0837# Show Software Version (instructions)
*#0001# Show Serial Parameters
*#9125# Activates the smiley when charging
*#0523# LCD Contrast
*#9998*228# Battery status
capacity, vol***e, temperature)
*#9998*246# Program status
*#9998*289# Change Alarm Buzzer Frequency
*#9998*324# Debug Screens
*#9998*364# Watchdog
*#9998*377# EEPROM Error Stack - Use side keys to select values