As dimitars84 said. Also you can ask for unlock key from the contractor after the contract is over but I think it'll be difficult for u given u r in India and device is from UK. You can give it a shot to wotan server or other such methods but I can't assure you that they'll work. Even if they'll its hard to tell whether fastboot would be enabled or not.
If you’ve ever entered apassword on your mobile device, you’ve surely … more
26 Aug 2014
By Tomek Kondrat
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?