*#06# for checking the IMEI (International Mobile Equipment Identity).
To view Week and Year of manufacture enter *#3283# [*# D A T E #]

The last two digits are the year. If the year is 95, the first two digits are the month. For 96 the first two digits are the week of the year.

To view the software version on 2110e / 2110i enter *#170602112302# or *#9999#
On newer phones, the code has been changed to *#682371158412125#

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.

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#

Bypass the SP lock With a Nokia 16xx/21xx/31xx/51xx/81xx

1. Insert SIM card of different provider.
2. Turn on the phone and press the UP VOLUME key for 3 sec.
Then release it and the phone says PIN CODE?
3. Press the "C" key.
4. Then Press * and wait until it disappears and appears again, then press * one more time and 04*PIN*PIN*PIN#

The phone now says: PIN CODE CHANGED (or ACCEPTED) and the SIM card is accepted until you restart the phone again.
NOTE: On version 5.04 Nokia has removed this option !

Cell-sites

To enable display of cell-site names, [MENU] 4-9-1

Received calls

To see received calls. Same As menu options (012)
Enter : * then Memory then Find or * then the down arrow Missed calls

To see missed calls

Same as menu option (01 3)
Enter : + then Memory then Find or + then the down arrow

DTMF tones

Pressing Menu, then Green Phone button allows you to transmit DTMF tones

Car kit Programming

If you use a car kit with handsfree AND additional handset, and you want to switch from handset to handsfree: Press the left menu button, and put the additional handset on hook. Now you are on handsfree.