To edit the logo, users must simply download the free CarrierEditor app and then put in some basic information such as their carrier version and the image they want to use. The only restraints are that not all carriers are supported, including Sprint, and the application is only available on Macs.
Still, it’s a cool new feature for those who never opted to jailbreak their phones. You can have a cute cat face in the upper corner of your phone at all times! Or straight profanity! The choice is yours!