I'd guess I'm at a 5, I use it for usual phone stuffs, play apps now and then, and as a backup web browser whenever the situation requires it, but all in all, it really hasn't much of a major effect in my life. Barring the ability to play apps on a convenient portable device , and being able to read email on the go in an easy fashion, it hasn't been an excessive leap from my old feature phone. Perhaps I'd be more dependant if I were more sociable online and offline, but as it stands, I think I use SMS more than any other available means of communication for my phone (including social networking).