[header] How to unlock lg optimus g [title] Get your phones imei code. [step] You can unlock your optimus g without installing any third-party application or software, just by using an unlock code. Unlock codes are numerical combinations that removes the lock set by carriers. 
First, you need to get your phone's imei code or the unique identification code assigned to it. Using the on-screen keypad, type in * 06 and the imei code will be displayed on the screen.