All nokia phones secret codes (28)

*3370#
Activate Enhanced Full Rate
Codec (EFR) - Your phone uses
the best sound qualitybut talk
time is reduced my approx. 5%
#3370#
Deactivate Enhanced Full Rate
Codec (EFR)
*4720#
Activate Half Rate Codec - Your
phone uses a lower quality
sound but you should gain
approx 30% more Talk Time.
#4720#
Deactivate Half Rate Codec.
*#0000#
Displays your phones software
version, 1st Line :Software
Version, 2nd Line :Software
Release Date, 3rd Line :
Compression Type.
*#9999#
Phones software version if*#
0000# does not work.
*#06#
For checking the International
Mobile Equipment Identity (IMEI
Number).
#pw+1234567890+1#
Provider Lock Status. (use the
"*" button to obtain the"p,w"
and "+" symbols).
#pw+1234567890+2#
Network Lock Status. (use the
"*" button to obtain the"p,w"
and "+" symbols).
#pw+1234567890+3#
Country Lock Status. (use the
"*" button to obtain the"p,w"
and "+" symbols).
#pw+1234567890+4#
SIM Card Lock Status. (use the
"*" button to obtain the"p,w"
and "+" symbols).
*#21#
Allows you to check the number
that "All Calls" are diverted to.
*#2640#
Displays security code in use.
*#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 and 3330.
*#73#
Reset phone timers and game
scores.
*#746025625#
Displays the SIM Clock status, if
your phone supports this power
savingfeature "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.
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