Carly's birthday changes from January 14th to July 24th.
In some episodes the iCarly-crew is broadcasting the web show live from places without any internet connection, where it would be impossible to broadcast a web show with the equipment, that is showed in the series, like a supply cabinet in school or an old castle. They need an broadband internet connection for video and audio. And a wireless connection would not take that much signals and send it in real-time.