First we will need a few things:

1. Serial cable that looks like this -
2. a 9V battery its them battery's that go in a smoke alarm
3. software which is called NS Dongle - click here to get it
4. make sure you have fully charged your phone as well.

Step 1: Take out your sim card from your phone connect the cable to your serial port on your pc then connect the other part to your mobile phone. Next attach the 9V battery to the connections on the cable.

Step 2: Download NS Dongle and unzip it to a folder now this is a cracked version you will need to install "CbSetup" first or it wont work then next click on "CbNsDongle"

Step 3: Now on the right side of the program there is a drop down box called "phone model" click to the phone yours is in my case it was a D500 under that there is "com port" i left my as COM1.

Step 4: Now click the button at the bottom called "Get Info" it will ask you to power on the phone so press the power button on and you will get a screen mode on your phone saying TAT MODE like show below in the image.



Step 5: Once it read all the info on your phone should say operation successfully completed keep your finger on your power button of the phone it should now turn off.

Step 6: Next click the button called "Unlock" now once you have clicked this button it will ask you to turn on your phone and do so it should go back into tat mode like above and say unlocking phone... it only takes about 30secs to unlock it should say operation successfully completed now turn your phone off again and put in another sim card

All should be well and your phone is now unlocked.