To view IMEI (International Mobile Equipment Identity) number enter   *#06#

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.

V 5.31

06-01-96

NHE-4

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 Provider(???)-Lock status
#pw+1234567890+4# for SimCard-Lock status

(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 !!!!!!!)
 
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!

With a Nokia 16xx/21xx/31xx/51xx/81xx that are SIMlocked to one provider you can bypass the SP lock like this:

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 disappear and appear 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.