Cydia App: WiCarrier
WiCarrier has similarities to MakeitMine and Fakecarrier, which replaces the status bar’s carrier name (Rogers, Telus, At&t, etc.) with the current connected WiFi network. For instance: You will notice the carrier name “Family Guy”, since that’s the WiFi network I’m connected too. WiCarrier works on iPhone, iPod Touch and iPad.
WiCarrier is available in Cydia from BigBoss repository for FREE.