If you could buy an electronic device, what would it be and why?

If I was stuck with only one electronic device for the rest of my life I would choose to buy an Iphone. The reason behind this choice of mine is because being able to call someone is very important for staying in contact with friends and family; or in an emergency situation. Also the Iphone has the ability to have apps on it like games, calculator, calender, etc. Another really important reason for my decision is that you can have and listen to music on it. Music is really important to me and has a great impact on my mood.