...nokia 3510 mobile phone

try online site

hi
you can get the unlock codes from here
http://www.mobile-unlocker.com/

You can get the sim unlock code through online..........give your IMEI number and get the sim unlock code for ur mobile.... i will suggest the website Unlock-Zone.com which is doing good service .....you can approach this website.
This site is nearly perfect and they were recommended highly in the cell phone forums. I used them to unlock my cell phone. contacted them and within 30 mins i had my unlock code and my phone was unlocked.
Hope this helps.

you can get the unlock code for your Nokia model mobile, through this site http://www.theunlockarena.com/nokia-3510/rs13wp9/
It provides the best instructions and easy methods for unlocking your Nokia mobile phones.........

Hi dodonaghue,
You can unlock your Nokia 6300 using mobile unlock code..
It is on the website http://www.mobileunlockguide.com/mobile-phone/16854/nokia-6300/ ..
The instructions are as follows:
Warning: Do not enter any wrong unlock unlock codes on your Nokia 6300 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.

1 - Switch on your Nokia 6300 mobile phone without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300 mobile phone.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6300 mobile phone would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6300 mobile phone

Each Nokia 6300 mobile phone has an unique unlock code. You can buy the unique unlock code for your Nokia 6300 mobile phone at www.mobileunlocksolutions.com.

go to this site input your desired unit to be unlocked, type in your imei.. then your done, inpuit the codes that will pop-out
to get your imei just press *#06# at your phone.. or take it the battery and see it at the back cover...underneath the battery location..
http://www.peters1.dk/unlock/nokia/online.php?sprog=en

you may try some default codes..........

I buy the phone from usa (t-mobile) but i have to travel to india and stay for a few month and i bought onu of the india services providers sim card and my phone ask me restricted code. Can you unlock it??

nokia 3510 b
imei: 353092/02/073606/2

Dear Sir:
I still need the unlock code for my phone.
Thank you for your support.

Sorry i don't know the security code.
But i found the site http://www.unlock-free.com/ for getting the free unlocking code for your mobile.It's useful for you.