Your favourite piece of technology

I like mi notebook because I think is more useful for writting, playing and watching tv series or movies, but recently my smartphone has been very useful and has made my life more comfortable, so I pick it. Since I study in this campus, the road until here is longer than the one used to take to Juan Gomez Millas. It take me one hour to arrive here, so I use it all days for reading some books on it or sometimes when I get mobile data to chat. Sometimes I use it to show my family places of Santiago and also for get to this places with Googlemaps. I just got my cellphone last year, since I'm living in Santiago it's easy for  me lose my stuff, you have to be aware of a lot of things here, at least at the begining. Anyway I think I have improved so this one will last.
I think life would be more difficult without a cellphone, the way until my home would be longer and I couldn't be connected with my family.