She is one of the few who is - and normally I hate this word - proactive.
Although she did forget that there are other phones in Italy. 
If All Movies Had Cell Phones(Stupid College Humor... needs to start embedding)
Personally, when I watch a movie I
never think how a cell phone could make things easier. Usually I'm too wrapped up in the story (and maybe it comes from living the first 20 years of my life where cell phones and the internet weren't so prevalent). But New Moon just might be the first time where even I picked up on this. As the plane was flying overhead, my thoughts were literally, "Wait...
this is the best way to get in touch with Edward? By flying to
Italy!?!" I didn't even think about passports, customs, etc. I figured that was probably the
least efficient way to do things.