Option 1 - Alcatel models
1. Turn on your phone without a SIM Card in it
2. Then type : * # 0 0 0 0 * YOUR_CODE_HERE #
3. And to finish enter : * # 0 0 0 1 * YOUR_CODE_HERE #
Option 2 - Alcatel models
1. Turn on your phone with a SIM card that's not the original network
2. When the message 'Enter Network Key' appears, enter the Unlocking Code provided.