Don't play with your mobile, there is no such free unlock tools for unlock your device, if you go with them they can damage or even harm your device , if such things are there they are the game some tech mans,
beside of that you have to go with unlocking websites with the little fee,
although unlock codes are the safest way to unlock your phone.
there are lots of vendors which provide the easy to use unlock code for your phone like,
http://www.codes2unlock.com
http://myphoneunlock.com etc.