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This tutorial provides you with the info and tools you need to unlock all "new" Nokia GSM phones - the DCT4 series. If you are the owner of one of theese phones that is locked to using only SIM cards from one Service Provider, but you would like to use it for another Provider, read on..... There is no reason for paying 50, 20, 10 or even 1 USD/EUR to some questionable internet based company when you can do it yourselves for FREE and in less than 5 minutes All you need is a Nokia DCT-4 phone, the software you can download further down this page and nothing else! You do not need any kind of interface or cable between your phone and computer.
The Nokia DCT4 phones are the following models : | 1xxx + 2xxx | 3xxx | 5xxx / 6xxx | 7xxx / 8xxx / 9xxx / N-gage |
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| Nokia 1100a
Nokia 1100b
Nokia 1220
Nokia 1260
Nokia 1261
Nokia 2100
Nokia 2220
Nokia 2260
Nokia 2300
Nokia 2300a
| Nokia 3100
Nokia 3100b
Nokia 3108
Nokia 3200
Nokia 3200b
Nokia 3300
Nokia 3300b
Nokia 3320
Nokia 3360
Nokia 3510
Nokia 3510i
Nokia 3520
Nokia 3530
Nokia 3560
Nokia 3585
Nokia 3590
Nokia 3595
Nokia 3600
Nokia 3620
Nokia 3650
Nokia 3660
| Nokia 5100
Nokia 5100a
Nokia 6100
Nokia 6108
Nokia 6200
Nokia 6220
Nokia 6230*
Nokia 6310
Nokia 6310i
Nokia 6340
Nokia 6340i
Nokia 6360
Nokia 6500
Nokia 6510
Nokia 6560
Nokia 6590
Nokia 6590i
Nokia 6600
Nokia 6610
Nokia 6610i
Nokia 6650
Nokia 6800
Nokia 6800a
Nokia 6810
Nokia 6820
Nokia 6820b
| Nokia 7200
Nokia 7210
Nokia 7250
Nokia 7250i
Nokia 7600
Nokia 7650
Nokia 8310
Nokia 8390
Nokia 8910
Nokia 8910i
Nokia 9210i
Nokia N-Gage
| (* = As of June 2005 this model is not unlockable using this tutorial! ) Even if your phone is not on the above list, it does not mean that your phone is not a DCT4 phone. The list may be incomplete. As a rule of thumb,all Nokia phones with GPRS support is a DCT4 phone. The method used for unlocking the phones in order to make them work with all Service Providers is by using "Masterkeys". Theese are keys that are in the phones in order for Nokia (or your Service Provider) to be able to remove all restrictions in your phone software. In every phone there is a total of 7 Masterkeys, that can all be calculated from the phones IMEI number and the identifier of the Network or Service Provider for which the phone is locked. A Nokia phones IMEI number is a 15-digit integer, which constitutes a unique serialnumber of the phone. The identifier of the Network is a unique integer for each Service Provider throughout the world. If you know the name of your Service Provider, the software on this page will translate that name into the appropiate Network Identifier. In a (Nokia DCT4) phone there is a total of 4 SIM Locks. Lock 1 : MCC+MNC (Network- og Country specific) Lock 2 : GID1 Lock (SIM Card type) Lock 3 : GID2 Lock (SIM Card type) Lock 4 : MSIN Lock (SIM Card specific lock) The previosly mentioned Masterkeys are of the following form :
#pw+XXXXXXXXXXXXXXX+1#
#pw+XXXXXXXXXXXXXXX+2#
#pw+XXXXXXXXXXXXXXX+3#
#pw+XXXXXXXXXXXXXXX+4#
#pw+XXXXXXXXXXXXXXX+5#
#pw+XXXXXXXXXXXXXXX+6#
#pw+XXXXXXXXXXXXXXX+7#
Where the "X" are different integers, and the integer after "+" for the rest of this tutorial will be referred to as the "Code Number" or "Code Identifier". Eeach Code unlocks one of more of the four SIM Locks. Code 1 disables Lock 1 Code 2 disables Lock 2 Code 3 disables Lock 3 Code 4 disables Lock 4 Code 5 disables Lock 1 and Lock 2 Code 6 disables Lockk 1, Lock 2 and Lock 3 Code 7 disables Lock 1, Lock 2, Lock 3 and Lock 4 As you can see, Code Number 7 is the "Masterkey" and unlocks all of the four different SIM Locks in the phone. Since there is no harm done in unlocking all Locks, Code Number 7 is the only really interesting key. The unlocking procedure is as follows :
Step 1: Remove your SIM card from the phone, and find the IMEI code. This is typically placed under the battery. It is IMPORTANT that the SIM card is NOT in the phone during the following steps!!
Step 2: Type the IMEI code in the software
Step 3: Choose the Service Provider for which the phone is locked (NOT the one you wish to use in the future!)
Step 4: Choose your phone-type (Type 5 must be selected for Nokia 3650, 3600, 7650 and N-Gage, type 7 for 6650, 7600 and type 2 for all others. NOTE!Nokia 6230 is of Type6 - at present time there is NO known method for calculating codes for this phone.
Step 5: Turn on your phone (WITHOUT a SIM Card) and type Code 7. - see instructions below.
Step 6: After this the phone will write : "Restriction off" and you can now use your phone with any Service Provider of your choice.
When the code (Code 7) is typed, you must type the ENTIRE code, including the characters : #pw+ and + #
1. Type "#"
2. Type "*" three times to get "p"
3. Type "*" four times to get "w"
4. Type "*" two times to get "+"
5. Type the 15 digits
6. Type "*" two times to get "+"
7. Type "7"
8. Type "#"
The typing is now done, and all the SIM Locks are disabled ! Disclaimer:
The owner of this website cannot be held responsible in any way for any kind of damage the above procedure may infer on you or your phone. The procedure has however been followed sucessfully by a lot of people including myselves, and I have never heard any reports of permanent damage to the phones. It is VERY important to be careful when typing in the codes. After 3 failed attempts the phone will Lock completely, and can only be unlocked by using a special interface between the phone and a computer. The software you need is called DCT4 Calculator 5.4 and it is written by Hollowman
The software can be downloaded here
If you appriciated the information on the above page, you are more than welcome to make a small donation in order to cover some of the expences for running this domain. By clicking the PayPal button below, you can make a small donation by either VISA, Mastercard or Paypal.
Good luck with your phone, which can now be used with any GSM Service Provider in the world.
/Machiavelli
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Nokia Unlock (English) 
