If you want to unlock one of the following Nokia handsets:
1100, 2300, 3100, 3200, 3300, 3510, 3510i, 3650, 3660, 5100, 6100, 6220, 6230, 6310, 6310i, 6510, 6600, 6111, 6610, 6650, 6800, 6810, 6820,7200, 7210 ,7250, 7250i, 7600, 7700, 7650, 8310, 8910, 8910i, N-GAGE

You will need software to do your own codes or join the forum and post your imei plus what network its locked to eg orange,o2

STEP1: Download DCT4 calculator which is here also try this one extract install.

STEP2: IMEI The 15 digit serial number of your handset. This can be found by pressing *#06# into your handset. or behind the battery.

STEP3: Complete the IMEI field, and then select the country and network your handset is locked too using the drop down list boxes. Now you need to select a lock type: either 2 or 5. Always leave this as type 2 UNLESS the phone you want to unlock is a 7650 or 3650 in which case select type 5. You will also See a check box - make sure this REMAINS checked (as this means the software will calculate the latest version 2 codes not the older less reliable version 1 codes)

STEP4: The program will produce a set of 7 codes, something like those below:

#pw+378826733640327+1#
#pw+294365622205166+2#
#pw+843021122162422+3#
#pw+444037722262334+4#
#pw+494227425204736+5#
#pw+733110464133111+6#
#pw+145234270304111+7#

Any one of the 7 codes codes will probably unlock your phone but I normally use Code 7 first, if that does not work then code 1 and on the rare occasion they both fail I try code 5.

STEP5: Now enter code 7 into your phone with NO sim card in!
To access "p" just press "*" three times within one second. To access "w" press "*" four times within one second. To access button "+" you have to press twice "*" within less than a second.

If successful you will see the message 'Phone restriction off' (if not you will get a 'code error' message).

Warning and Tips

If the unlock code has been entered incorrectly 5 times or more then upon entering in further codes the phone will display "cannot undo restriction" (or "Not Allowed" for Symbian phones - 7650 / 3650 / N-Gage) message instead of "code error". If you see the "cannot undo restriction" or "Not Allowed" message then only a proffesional unlocker can help you by using an expensive cable soloution!

If the code does not work after a couple of tries:

1) Double check you have entered the correct IMEI - press *#06# into the handset to display your IMEI. (many people type a digit in wrong)
2) Double check what network the handset is locked too and your network code.
3) Make sure your phone is not already unlocked! sounds daft but some people just don't know what they are doing!

To check if your phone is locked, insert a foreign sim into the handset. (i.e. a sim that the handset will not accept) - the phone should display something like 'enter restriction code' - if you do not see this then your phone is not locked!

If Your phone is already unlocked you will always get code error regardless if you enter the correct code or not!!!

As mentioned earlier, to prevent dissapointment please post your details on my forum if you have 3 failed attempts.

NB. Do not worry, you CAN NOT damage your phone by entering the incorrect code more than 5 times! Its just that you will not be able to unlock it even with a correct code if you have! So unlocking by codes is very safe.

Read this page if you dont want to do the codes your self.