new nokia tips & tricks and hidden secret codes

new and some old secret codes for nokia phones.
Note: “Some of these codes are really dangerous so please try them if you know about them or if you can deal with them.”
Codes & Action
*3370# >> It activates Enhanced Full Rate Codec (EFR).

#3370# >> Deactivate Enhanced Full Rate Codec (EFR).

*#9999# >> check nokia phone software version if *#0000# does not work.

*#2640# >> Displays the current phone security code.

*#30# >> Lets you see the private number.

*#06# >> For checking the International Mobile Equipment Identity in short imei no.

press and hold # >> switch between lines 1 and 2.

*#7780# >> Restore factory settings

Stay tuned if you want to know about more secret codes for nokia phones…