Change the iPhone Carrier Name
You can change the carrier name on your iPhone using a free tool called “Fake Operator” that is available through the Cydia store. Installing the tool requires a jailbreak, and then the carrier name is adjusted through the Settings app.
If you want the app, after you have jailbroken your phone (you can download redsn0w 0.9.6b6 if you need the latest jb app), just search the Cydia store for “Fake Operator” and install it.
Adjusting the cell operator name is a fun way to customize your iPhone, and many people will set it to their own name or whatever else. This and similar apps are the primary method of creating fake Verizon iPhone pictures that have become somewhat popular around the web (an example of an alleged Verizon iPhone with the carrier name set), as you can see in the image below:
Because it is so easy to change the iPhone carrier name, don’t take these pictures as any particular evidence of an iPhone moving onto a new network.