1. First find Cydia on the mobile phone desktop, as shown in the figure below.
2. Enter the software source code-Edit-Add, enter the newly added source code, and install Zeppelin, as shown in the figure below.
3. After the installation is completed, go back to the mobile phone desktop to enter the settings, then go down and find the newly installed Zeppelin, and click it in, as shown in the figure below.
4. Finally, click on the carrier text in the upper right corner, enter your favorite text, click Save, and the operator will be set.