iPhone simulator shows “Carrier” as default carrier name. You can change this name whatever text you want.
1. Open ~/Library/Application Support/iPhone Simulator/User/Library/Preferences/com.apple.springboard.plist file with Property List Editor application
2. Add a new Row with key name “SBFakeCarrier”.
3. Set its value as whatever you want.
4. Save plist file and that’s it. You will see the text you entered in step 3 in the iphone simulator.