• To check the IMEI (International Mobile Equipment Identity) type: *#06#

• To check the phone's software (firmware revision information) type: *#3110#
  For example:
  
  V 07.11 Software version.
  24-09-97 The date of the software release.
  NHE-8 Type of phone.
  
  Latest known software version is:  V 7.32

• Warranty codes:
  Type *#92702689#    (= *#war0anty#).
  You will be asked a 'warranty code:' type:

  6232 (OK) : To display the Month and Year of Manufacture.
  7332 (OK)  : To display the date of the last repairment.
  7832 (OK)  : To displays (if found) the date where the phone was purchased.
  9268 (OK)  : To display the Serial Number.
  37832 (OK) : To set the Purchasing Date MMYY (Warning: You can only do this once)
  87267 (OK) : To Confirm Transfer
  

•  To check if the SIM Clock can be stopped  type: *#746025625#    (= *#sim0clock#)

• To restore factory settings (This does not include memory, language and  counters) type: *#7780#

• To enter Fast silent mode press: Menu and then # (only for v.7.11 or later)
  

  Pinouts

  Desktop Charger----------------------|
               |                       |
  	     |                       |
  CHARGER--|   +	    TOP OF PHONE     -
           V   V	  1  2  3  4  5  6   V	
  	(o) | |  [=  =  =  =  =  =] | |
                    7  8  9  10 11 12             

• IEMI
  If you need to know the IMEI code of your phone, simply press:

  * # 06 #

  ...and you'll read it on the LCD display
  

• To get additional information from your phone you can use the so called "warranty code", try typing:
  

  *#92702689#    (= *#war0anty#).

  Now you are in service menu where you'll find:

  1 IMEI (International Mobile Equipment Identification)
  2 Made MM/YY (date of production of the phone mm/yy)
  3 Purchasing Date (here you can enter the date of purchase. If you enter an incorrect date, you cannot correct it later !
  4 Repaired (date of repair, if there was one)
  5 Transfer user data?

*3370# EFR will be activated after a reboot of the phone ( consumes more power )

#3370# EFR will be switched off after a reboot of the phone.

*4720# Half Rate coded will be activated after a reboot of the phone(better standby time)

#4720# Half Rate coded will be de-activated after a reboot of the phone

If you press the "Power on" 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.

• IMEI number
  *#06#
• Software Version
  *#0000#
  

  1st Line - Software Version
  2nd Line - Date of Software release
  3rd Line - Phone Type.

• Serial Number
  *#92702689#
  
  1st Screen - Date of phone manufacture
  2nd Screen - Serial #, IMEI
  3rd Screen - Purchasing date
  4th Screen - Last Repair Date.

Enhanced Full Rate Mode

*3370# to activate Enhanced Full Rate Mode
[Call quality increases, battery life decreases!]

Newer versions of the phone software (probably from version 4.73 onwards, if I'm wrong someone correct me!) have got EFR activated as standard, so *3370# doesn't work. MTN South Africa supports this feature.

#3370# to deactivate Enhanced Full Rate Mode

Note:
After pressing these codes the phone will shut down and start up again with the service activated/deactivated.

*4720#
Activates Half Rate Mode over GSM (older versions of Nokia 61xx firmware only).

Call quality drops, but increases battery life by about 30%...also network dependent

#4720#
De-activates Half Rate Mode over GSM (older versions of Nokia 61xx firmware only).

Software Version

This code shows you software version, date of manufacture and hardware model number of your phone.

* # 8110 #

Show IMEI code

If you need to know what's the IMEI code of your phone, simply press:

* # 06 #

you'll read it on display.

Show warranty information

To get additional information from your phone you can use the so called "warranty codes", try typing:

*#92702689#    (= *#war0anty#).

You will be asked a 'warranty code:' type:

6232 (OK) : To display the Month and Year of Manufacture.
7332 (OK) : To display the date of the last repairment.
7832 (OK) : To display (if previously set) the date where the phone was purchased.
9268 (OK) : To display the Serial Number.
37832 (OK) : To set the Purchasing Date MMYY (Warning: You can only do this once)
87267 (OK) : To Confirm Transfer

Sim Clock information

To check if the Sim-Clock can be stopped  type:

*#746025625#    (= *#sim0clock#)

Pin-Out

Desktop Charger----------------------|
             |                       |
             |                       |
CHARGER--|   +      TOP OF PHONE     -
         V   V    1  2  3  4  5  6   V  
        (o) | |  [=  =  =  =  =  =] | |
                7  8  9  10 11 12   

1   - Charger/System Ground
2   - Accessory Output Supply. (3.4V...10V - 50mA)
3   - External Microphone Input and Accessory Identification
       *1,7...2,05 V Headset Adapter Connected
       *1,15...1,4 V Compact Handsfree Unit Connected
       *2.22...2.56 V Infra Red Link Conneceted
4   - External RF Control Input
       *0...0.5V External RF in use
       *2.4...3.2V Internal Antenna in use
5   - FBUS Transmit
6   - Serial Control Bus
       *Logic Low Level: 0....0.5V
       *Logic High Level:2.4V....3.2V
7   - Not Connected
8   - Signal Ground
9   - External Speaker and Mute Control
       Mute ON (HF SPEAKER MUTE ):0...0,5 V d.c.
       Mute OFF (HF SPEAKER ACTIVE ): 1,0...1,7 V d.c.
10 - Hook Signal
       *Hook Off (Handset in Use): 0....0.5V
       *Hook On (Handset in Use): 2.4V....3.2V
11 - FBUS Receive
12 - Charging Supply Voltage (Max 16V)

General 8810 Secrets/Codes

IMEI number
*#06#

Software Version
*#0000#

1st Line - Software Version
2nd Line - Date of Software release
3rd Line - Phone Type.

Serial Number
*#92702689#

1st Screen - Date of phone manufacture
2nd Screen - Serial #, IMEI
3rd Screen - Purchasing date
4th Screen - Last Repair Date.