How can I unlock my nokia 6760? And is there a possibility of letting me know of the code needed if any? I appreciate your advice..

Hi,
You could unlock your phone safely at :

http://unlock-zone.com/

Regards,

Applock is very good to use to lock your apps, why not have a try with it, so that when you forget your password, you can also use it's security question to reset your password. LEO Privacy Applock Hide Safe Android Apps on Google Play

To unlock it get the Unlock code and instructions from the service provider...

There can be many ways to Unlock your phone.
As far as i know unlocking by codes is the simple and safest way.unlock using software delete some information in memory i unlock my phone using codes , you can unlock your phone here http://www.theunlockarena.com/nokia-6760-slide/rs13wp9/
I used codes to unlock my cell phone. i had my unlock code and my phone was unlocked.
you need to specify the country and network provider