How to unlock a Samsung Tocco Lite from Vodafone to O2?

i want to unlock my samsung tocco lite from vodafone to o2. does anyone know how to do this for free with like a code or number? please help.

I was not able to get a free unlock code for the mobile model that you have specified.You can approach Classicunlocking.com and get the required unique unlock code for your Samsung Tocco lite.Once unlocked you can switch networks.