As I have a SIM-free iPhone6 without phone carrier's loan, I don't need to buy every 2 years. But I feel it's time to buy another iPhone. Apple's products is seem to be bought every 2 years.
I checked account book last night, and I found that I'll be able to buy iPhone7 if I won't spend money for others.
I'd like SIM-free iPhone7 64G. I had had 16G, but it's inconvenient to take a movie and to listen to music. I'll possibly buy 128G.