*#06# for checking the IMEI (International Mobile Equipment Identity)

*#0000# To view Software Version.
*#6110# Try this code if the above code doesn't work.

*#746025625# [*#sim0clock#]
Checks if the sim clock can be stopped. Sim clock stop is a kind of stand-by mode which will save battery time. This code doesn't work with software version 4.59.

*#92702689# [*#war0anty#]
You don't need the warranty-codes any more - you can just scroll through the information like in any other menu. It has the same data as 81xx and 31xx phones (with "Edit" button for purchase date, and "User data transfer").

Menu:
1: Displays Serial Number.
2: Displays the Month and Year of Manufacture (0997)
3: Displays (if there) the date where the phone was purchased (MMYY) you can here set the Purchasing Date (Warning: You can only do this once - so be careful what you write...)
4: Displays the date of the last repair - if found (0000)
6: The option is for transferring ALL the telephone data (from the memory) to a "box" so that the technician can fiddle with the phone without worrying about the data stored on it. Stuff stored on the SIM is not transferred, but who delivers their phone with the SIM? :)

Enhanced Full Rate Codec (EFR):
On: Enter *3370# and EFR will be activated after a reboot of the phone ( consumes more power )
Off: Enter #3370# and EFR will be switched off after a reboot of the phone.

Half Rate Codec:
On: Enter *4720# and Half Rate coded will be activated after a reboot of the phone ( better standby time )
Off: Enter #4720# and Half Rate coded will be de-activated after a reboot of the phone

Network Monitor
There is a hidden menu inside your Nokia phone. If you want to activate it, you'll have to re-program some chips inside of your phone or the easier way is by using the Software Pclocals and the MBUS cable.

with reprogramming:

1.Check your software version. You can only continue if you have v4.33, v4.73 or v5.24.
2.Take apart the phone.
3. De-solder the EEPROM (ATMEL AT 24C64).
4. Read out the data with an EEPROM programmer and save it to a file (Backup).
5. If you have v.33 or v4.73, change the address "03B8" from "00" to "FF".
6. If you have v5.24 then change the address "0378" from "00" to "FF".
7. Write the new data to the EEPROM and solder it back to the phone.
8. Power on your phone and you should have "Netmonitor" enabled.

with Software Pclocals:

1. You'll need an MBUS cable and Pclocals.zip. (To get this file, E-Mail Us your request)
2. After the splash screen of the program, you'll have to set-up the com port where your cable is attached.
3. After "Initializing connection" choose "MR Memory Functions" and once you arrive at this menu choose the menu 6.
4. Then type 243 ad Field Test Display to activate the full netmonitor or 241 to deactivate it.

The Network Monitor gives you the following information.

• Carrier number
  
• MS RX Level in DBM
  
• Received signal quality
  
• MS TX power level C1 (Path loss criterion, used for cell selection and reselection). The range is -99 to 99.
  
• RTL (Radio link timeout).
  
• Timeslot
  
• Indication of the transmitter status
  
• Information on the Network parameters.
  
• TMSI (Temporary Mobile Subscriber Identity).
  
• Cell identification (Cell ID, Number of cells being used).
  
• MCC (Mobile country code)
  
• MCN (Mobile network code)
  
• LAC (Location area code)
  
• Ciphering (On/Off)
  
• Hopping (On/Off)
  
• DTX (On/Off)
  
• Discard cell barred information.

The Reboot Trick
Should work on all software versions.
1. Go to calendar (menu - 8)
2. Make note / reminder
3. Enter some text into the edit box
4. Hold clear until whole text is cleared, then press Back
5. Press 0. Main screen is shown but a space appears on the screen. You can't see it of course.
6. Enter 4 digits (1234, for example)
7. Use the down arrow to move the cursor to the left side of the numbers and the space (2 times down arrow)
8. Now enter 6 digits and press the green "Call button".

Wait some seconds...the phone will now flash the background light and finally reboot. The trick should also work on other menus like the profile menu...

The James Bond Trick
If you short-circuit the left middle and right pins on the bottom of the phone with all connections touching each other, the Nokia software hangs! The profile "Headset" will be activated. Before you do this just activate the "Automatic Answer" in the headset profile and set the ringing volume to "Mute". Now you can use your phone for checking out what people are talking about in a room. Just place it under a table in a room and call it. The phone receives the call without ringing and you can listen to what people are saying.

Service Prover Lock
The service provider (SP) lock is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator, if one inserts a SIM card from a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator.

All Nokia phones (2110 and newer) have four different SIM locks which can be used to lock the phone for up to 4 different providers. But most phones with restriction only have one lock activated. ( lock 1)

The main code used in Nokia phones is:
#pw+(master code)+Y#
This code is able to check, activate or remove Sim card restriction (SP-lock).
Use the * key to get the p, + and w chars.
'Y' has to be 1,2,3 or 4 - depending of what lock you what to deal with.

#pw+1234567890+1# for Provider-Lock status
#pw+1234567890+2# for Network-Lock status
#pw+1234567890+3# for Country-Lock status
#pw+1234567890+4# for SimCard-Lock status

# = DOUBLE-CROSS
W = PRESS "*" THREE TIMES
P = PRESS "*" FOUR TIMES
+ = PRESS "*" TWO TIMES
MASTERCODE = 1234567890
Y = NUMBER 1 TO 4

(master code) is a 10 digit code, based on the phones IMEI number.
(I can NOT give you the master code - SO DON'T ASK ME FOR IT !!!!!!!)

Eg. To remove restriction on lock 1 type following code:
#pw+(master code)+1#
If you just want to check your phone use 10 random numbers Eg. 1234567890 as the (master code)
eg. To check if phone if restricted on lock 1 type the following code:
#pw+1234567890+1#

Please NOTE that these codes could be used with care! A user told me that it's only possible to type in about 3 different codes on each lock! Then something bad will happen ..therefore be careful!

Power Button Tip:
If you press the button for a short moment, the menu with the profiles is shown on the display. If you press one more time, the mobile turns itself off. You can use the up and down cursor keys to scroll and enable a different alert setting.

The 54# Tip:
Type 1#, 2#........54# on the keypad (when you're not in the menu) to get the phone number used for with this key when speed dialing.

Free SMS Tip
1st Way:
1. turn our phone off.
2. turn it on and enter your pin.
3. enter *#746025625# 4. now "SIM CLOCK STOP ALLOWED" will be displayed.
now you can send sms for free. if you turn your phone off and later on you have to reenter this code!!!
In some Networks it doesn't work!!!
2nd Way:
Set Menu 4-3-3 on Usergroup 666 (work with German Networks)

Free Call Tip
NB. The tips needs Net Monitor enabled. Be aware that the trick will remove Netmonitor in some sw versions like v4.73, v5.04 and v5.24.

1. Launch the NetMonitor in your Nokia 51xx / 61xx
2. Execute the test number 497
3. Free calling for about 90 sec should now have been activated.

The trick has not been confirmed working yet.

Revealing the Headphone and Car-Kit menus
Please note that if you do these next tricks, the new menus can't be erased without restoring the factory default settings. To do these tricks you need to short-circuit the pins on the bottom of the phone next to where you plug in you charger.

1. To activate the "Headset" menu, you need to short-circuit pins "3" and "4". After a short time the word "Headset" will be shown in the display. Menu 3-6 is now enabled.
2. To activate the "Car" menu, you need to short-circuit pins "4" and "5". After a short time the word "Car" will be shown in the display. Menu 3-7 is now enabled.

Quick SMS Typing
When typing SMS messages, you have to wait some seconds before you can type the next letter if it is in the same button than the previous one. For example try to write the word "letter", you have to wait before you can enter the second "t".. A much faster solution is to press the # button twice and then the letter "t" or just press the down button once and continue to use the same letter key