Going to be getting an iphone 6 soon. Not sure what size memory to get? I know I'll likely want to take plenty of pictures and have apps and stuff. One review said that the 16 gb 1/3 of memory is taken up by the operating system? I will be getting this phone to have for a while I'd imagine. So don't want to get something that I won't be happy with for the long run. Should I go with the higher memory or can any one explain more that would favor the 16gb. Cause it is more $ the more memory you get.