For those who dislike the name of the carrier on their iPhone the following tutorial will provide an easy trick to change that offending name.
How to change iPhone carrier name:

Start the Cydia application on your jailbroken iPhone
Search in Cydia to find the app “Fakecarrier”
Select the app by tapping on the name and click on ‘Install’. Follow the instructions to install the app. Finally, click on ‘Return to Cydia’ to finish installation.
Once the installation is completed, you will be able …