Give your iDevice a cool carrier logo with Cydia tweak called Zeppelin. Zeppelin is a  MobileSubstrate Tweak available via Cydia for free. Zeppelin lets you change the carrier logo easily to one of many built in carrier logos. The tweak work any  iOS over iOS 4.0.x to  iOS 6.0.x.

The tweak is developed by Alex Zielenski, you can download Zeppelin via Cydia. If you like this tweak please  please consider donating to the developer. Zeppelin now doesn’t require a re-spring to change the logo, all changes take effect in real time without the need to re-spring. Zeppelin is fully compatible with all iDevices.

Storm-Trooper Logo is custom and can be found here.

Currently the tweak comes with the following carrier logos

Android, Aperture Science, Assassin’s Creed, Batman, Beats by dre, Blue Cloud, Infiniti, Pac-Man, Space Invaders, Superman, Triforce.

Note: You can add your own under : /Library/Zeppelin