*#30#

Lets you see the private number.
 

*#43#

Allows you to check the "Call Waiting" status of your phone.
 

*#61#

Allows you to check the number that "On No Reply" calls are diverted to.
 

*#62#

Allows you to check the number that "Divert If Unreachable (no service)" calls are diverted to.
 

*#67#

Allows you to check the number that "On Busy Calls" are diverted to.
 

*#67705646#

Removes operator logo on 3310 & 3330.
 

*#746025625#

Displays the SIM Clock status, if your phone supports this power saving feature "SIM Clock Stop Allowed", it means you will get the best standby time possible.
 

*#7760#

Manufactures code.
 

*#7780#

Restore factory settings.
 

*#8110#

Software version for the nokia 8110.
 

*#92702689#

Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode you need to switch your phone off then on again.
 

*#94870345123456789#

Deactivate the PWM-Mem.
 

**21*number#

Turn on "All Calls" diverting to the phone number entered.
 

**61*number#

Turn on "No Reply" diverting to the phone number entered.
 

**67*number#

Turn on "On Busy" diverting to the phone number entered.
 

12345

This is the default security code.

press and hold #

Lets you switch between lines.