We Start with the basic secret code which is common for all mobile phones
4) *#9998*3323#” This code is used to unlock the samsung corby to all networks.
1) *#9998*4357#” This will bring a Help Menu where we can select a lot of inbuilt options.
2) *#9998*5282#” This will bring a Java Menu where we can set the GPRS/CSD Settings for java server.
3) *#9999#0#” This will bring a Monitor Mode Menu.
4) *#9999# or *#9998*9999#” This will bring a Software Version Menu.
5) *#8888# or *#9998*8888#” This will bring a Hardware Version Menu
6) *#9998*746# or *#9998*0746# or *#0746#” This will give the Sim Information.
7) *#9998*523# or *#9998*0523# or *#0523#” This will display the Contrast options.
8) *#9998*842# or *#9998*0842# or *#0842#” This will bring the Vibration On options.
9) *#9998*289# or *#9998*0289# or *#0289#” This will bring the Buzzer On option.
10) *#9998*288# or *#9998*0288# or *#0288#” This will bring the Battery & Field Information.
11) *#9998*377# or *#9998*0377#” This will bring the Error log
12) *#9998*778# or *#9998*0778# or *#0778#” This will bring the Sim Service table
13) *#9998*782#” This will bring the date and alarm clock options.
14) *#8999*638#” This will bring the network information.
15) *#9998*5646#” This will bring the change operator logo at startup
16) *#9998*76#” This will show the production number
17) *#9998*968#” This will bring the melody for alarm option.
18) *#9998*585#” This will bring the Non-Volatile Memory (NVM) option.
19) *#3243948#” This will bring the Digital Audio Interference Off option.
20) *#32436837#” This will bring the Digital Audio Interference On option.