I have written unlocking solution of various mobile phones and modems. Today, I am writing about Nokia Security code. Forgetting your security code of Nokia Mobile Phone can be frustrating for you. You need this code when you want to reset your phone settings. Without the master security code you can not master reset your phone. The master code is a 10 digit number that will always be accepted as if it were your actual security code.
 
You can use the master code to change your security code back to what ever you like. When your Nokia handset asks you for the security code simply enter the master code.
The master code of Nokia Phone is specific to your handset and it can be generated using the handset 15 digit IMEI number (serial number). The IMEI number can usually be found on the sticker underneath the battery or you can get it by typing *#06# into the phone keypad.
 
Simply enter your 15 digit serial / IMEI number into my online tool (link has been provided at the end of the article). Your master code will then be calculated instantly. Then you need to enter this code into your Nokia when prompted for the security code.
Reset Nokia Security Code FREE instant Online Tool
The calculated master code will only work for DCT3 and DCT4 Nokia phones. It will not work with the newer BB5 handsets. See below for a rough compatibility guide or look at my Nokia generation list to check if your model is supported. The feedback I have received is that’s IT WILL NOT WORK FOR THE 6230i model (the 6230 is fine).
Compatible phone models :
 
DCT3 2100 3210 3310 3330 3410 402 5110 5210 5510 6110 6150 6210 6250 6500 7110 8210 8250 8850 8890 9000 9100 9210
DCT4 1100 1101 1110 1600 2300 2600 2650 3100 3120 3200 3220 3510 3510i 3650 3660 5100 5140 6020 6021 6030 6060 6070 6080 6100 6101 6103 6170 6111 6220 6230, 6260 6310 6310i 6510 6810 6820 6822 7200 7210 7250 7250i 7260 7270 7280 7360 7600 7610 7650 7700 8310 8800 8910 8910i
 
Incompatible phone models :
 
BB5 5500 Sport, 6131, 6125, 7380, 7360, 7370, E70, E61, E60, 3250, 6280, 6681, 6680, 6630, 6233, 6151, E50, 7390, 7373, 5200, 5300, 6136, 6288, N70, N71, N72, N73, N80, N91, N93, N70 Music Edition, N95, N91 8GB, 6300, 6086, N76, N93i, N73 Music Edition, E90, 3110 classic, 6110 Navigator, E65, E61i, N80 Internet Edition, 5700, 5070, 6120 Classic, 1650, 2630, 1200, 1208, 2760, 3109 Classic, 6500 slide, 3500 classic, 6267, 6121 classic, N81 8GB, N81, N95 8GB, 7900 Prism, 7500 Prism, 6555, 5610, 5310, E51, 6301, N810, N82, 3110 Evolve, 8800 Arte, 8800 Sapphire Arte, 3120 classic, 2600 classic, N78, N96, 7900 Crystal Prism etc.
ASIC 11 2760, 2626, 2660, 2630, 2610, 2610b, 1112b, 1112, 1110i, 1200, 1200b, 1208, 2310, 8800 Sirocco
Note : The default security code for ALL Nokia handsets is 12345. This is also called the phone lock code.

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