Me and my cellphone

I have something to confess, I must say that, by far, my favorite piece of technology is my cellphone, and its because I just can't live without it. Is pretty useful indeed, whit all the applications phones have now (they're 'smartphones' rigth now). I can feel like a sir by listening some classical music, I write my memos on it, it's my alarm clock, my calendar. Also I can check my e-mails, its like everything! (I even have a world map on it). And is really worrying me, yes. How can I depend that much on something? I've always though if someday fell by accident into an island and got trapped there by myself... Well, I have to be optimistic, maybe I wouldn't need my phone there, not pretty sure about that.