Help my phone is nokia 6680 model, there is a lock code, and now my simcard number is the only sim , my nokia 6680 is accepting, how can i unlock the code? when if i try to unlock it it says code error.....

SOURCE: how to unlock a Nokia 6630?

Give this a try?

http://www.symbian-freeware.com/download-unlockme-1-0.html

SOURCE: Unlocking

Contact the orginal carrier fro an unlock code. That is the safest. If you are unable to get the code through them there are tons of websites out there that provide unlock codes. most cost $$. Be careful though,. If the wrong code is entered too many times the phone will be permanently locked to the original carrier

SOURCE: Need unlock code for NOKIA 6680

my phone can not access network.mobile centers told me its a country lock. i bought the mobile from singapore. its nokia 6680

SOURCE: cannot use other sim can you give how to unlock

You will need to unlock the network settings on your phone. I could only find one way known to unlock some nokia phones.

==UNLOCK TO NETWORKS==
Unlock service provider: Insert sim, turn phone on and press vol up(arrow keys) for 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin# \
*#7328748263373738# resets security code.
Default security code is 12345

I can not promise you it works however this is the only way that I could find from several resources. Post back if you need any further info.

Thank you for choosing Fixya!

SOURCE: unlock my nokia 6300

Hai,
You can visit the site mobileunlocker.In that site contains the unlocking instructions and unlock code for the nokia 6300.its contains the unlocking instructions for all mobiles.