Who I have the same questioned this topic

My contract is up in November 2016 and I want to have my SIM card unlocked so I can use my phone on a different carrier.  What is the procedure for getting this done?  Do I need to call someone, or is there an online request form I can submit to get this done?  What actions are required by me the user to implement this unlock?  Or is it done automatically?  This is for a Droid Turbo if that matters.  Thanks!