Secret tricks for samsung mobile or cellphone

 If you have downloaded corrupted or incompatible Java midlets or other media,
  which are causing problems with the phone, try this
  *2767*JAVA# Java Reset and (Deletes all Java Midlets)
  *2767*MEDIA# Reset Media (Deletes All Sounds and Pics)
  *2767*WAP# Wap Reset
  *2767*CUST# Reset Custom EEPR0M
  *2767*FULL# Reset Full EEPR0M (Caution)
  For example : *2767*JAVA# would be keyed in as *2767*5282#
  Note : Not all codes will work with SGH-C100.

  The master reset code is:
  #*7728#
  This will not delete anything from your
  mobile phone, but set each and eveything to its

  default/standard setting as it was on the time of purchase.

Other Samsung Codes
 
*#9998*4357# Help Menu
  *#9998*5282# Java menu (GRPS/CSD settings for JAVA server)
    *#9999#0# Monitor Mode
  *#9999# or *#9998*9999# Software Version
  *#8888# or *#9998*8888# Hardware Version
  *#9998*746# or *#9998*0746# or *#0746# Sim Infos
  *#9998*523# or *#9998*0523# or *#0523# Display Contrast
  *#9998*842# or *#9998*0842# or *#0842# Vibration On (until you push OK)
  *#9998*289# or *#9998*0289# or *#0289# Buzzer On (until you push OK)
  *#9998*288# or *#9998*0288# or *#0288# Battery & Field Infos
  *#9998*377# or *#9998*0377# Error log
  *#9998*778# or *#9998*0778# or *#0778# Sim Service table
  *#9998*782# show date and alarm clock
  *#8999*638# show network information
  *#9998*5646# change operator logo at startup
  *#9998*76# production number
  *#9998*968# view melody for alarm
  *#9998*585# Non-Volatile Memory (NVM)
  *#3243948# Digital Audio Interference Off
  *#32436837# Digital Audio Interference On