*#0000# (with or without SIM)
Phone software version, Software version date (in DD-MM-YY format), Phone type (for example: N97 mini, RM-555), on some newer mobile phones: Custom version, Language set, Model name. Some cheaper phones needs SIM card to enter this code. Try *#9999# if *#0000# doesn't work.

*#92702689# (with or without SIM)
(*#WAR0ANTY#) IMEI number, when was the mobile phone made, purchasing date, date of repairings, life timer (incoming and outgoing calls). Note that You can't exit from this menu, You have to restart the phone after entering this code.

*#62209526# (with or without SIM)
MAC address of the internal Wifi adaptor

*#2820# (with or without SIM)
Bluetooth Device Address (Bluetooth MAC address)

*#7370# (with or without SIM)
Formatting Symbian Nokia phones. It is the same as "Factory settings" menu in the settings -> Phone. It will erase all data and applications from phone memory. Security code will be asked before erasing.

*#7780# (with or without SIM)
Factory reset. Restore original phone settings. It resets the phone settings, but leave the applications on phone.

*#7370925538#
(*#RES0WALLET#) Reset "Wallet" contents.

*3370#
Turn the EFR ("Enhanced Full Rate" coding) on. It improves call quality, but needs about 5% more energy.

#3370#
Turn the EFR ("Enhanced Full Rate") off.
*4720#
Turn the HRC ("Half Rate Codec") on. (Lower sound quality, but longer talk time.)

#4720#
Turn the HRC ("Half Rate Codec") off.

#pw+1234567890+1#
Provider lock status. It works only on DCT3 phones. If "SIM not restricted" appears after entering the code, the phone's provider lock status is open (unlocked). (Press "*" button several times to write "p" and "w" in phone.)

#pw+1234567890+2#
Network lock status. It works only on DCT3 phones. If "SIM not restricted" appears after entering the code, the phone's network lock status is open (unlocked). (Press "*" button several times to write "p" and "w" in phone.)

#pw+1234567890+3# Country lock status. It works only on DCT3 phones. If "SIM not restricted" appears after entering the code, the phone's country lock status is open (unlocked). (Press "*" button several times to write "p" and "w" in phone.)

#pw+1234567890+4#
SIM Card lock status. It works only on DCT3 phones. If "SIM not restricted" appears after entering the code, the phone's SIM card lock status is open (unlocked). (Press "*" button several times to write "p" and "w" in phone.)

*#746025625#
SIM Clock stop allow

*#67705646#
(*#OPR0LOGO#) Removes operator logo. It does not works on every Nokia mobile phone software versions. Tested and working on 3330 and 3310.

*#43# then call (green, send) button
Status of "Call query". It may not work on older mobile phones.

*43# then call (green, send) button
Enable "Call query".

#43# then call (green, send) button
Disable "Call query".

*#170602112302# or *#682371158412125#
Shows the software version on very old nokias made before 1998 (1610, 1611...).

*3001#12345[OK] or *3001#12345#
Enter test mode. It works only on very old Nokias.

*#3283#
Show the month and the year of manufacture. It works only on very old Nokias.

*#5511#
It tested and works on 1600 LCD normal position

*#5513#
It tested and works on 1600 rotate LCD 180°

*#5512#
It tested and works on 1600 rotate LCD 90° left

*#5514#
It tested and works on 1600 rotate LCD 90° right

Procedure of entering NCK code in Nokia phones

Press "*" button 2 times for "+" character.
Press "*" button 3 times for "p" character.
Press "*" button 4 times for "w" character.

1. Turn ON phone without SIM card.

2. Enter:
  • #pw+15 digit NCK+1# for unlocking "Provider Lock" (usually this lock is closed)
  • #pw+15 digit NCK+2# for unlocking "Network Lock"
  • #pw+15 digit NCK+3# for unlocking "Country Lock"
  • #pw+15 digit NCK+4# for unlocking "SIM Card Lock"
  • #pw+15 digit NCK+5# for unlocking "? Lock"
  • #pw+15 digit NCK+6# for unlocking "? Lock"
  • #pw+15 digit NCK+7# for unlocking "All Locks" (You may use this code, it will unlock all locks.)
3. Phone should give "Phone restriction off" message. There are some phones which are hangs after entering the code. In this case insert a SIM card which is not accepted, then "Invalid SIM card" will appear. Now press "Unlock" button then enter the code. If that method is not working, try the procedure with an accepted SIM.

4. Now phone is unlocked.