As I'm sure has been said, it all depends on hand size. I tried out the 6 plus in the store, and I could handle it just fine with one hand. But for some people its very different. I don't think they should just take away the option of a smaller phone. I have an iPod touch, and I like it because it is just so easy to handle, and it is super thin and super light (a millimetre thinner and about half the weight of the 6 plus) and for some people that would be fine, but I usually go to my iPad for most things, because it just doesn't work on that tiny 4-inch screen the way it does on the 9.7-inch screen. Apple and developers have done a great job putting iPad like features onto the 6 plus. if they keep that going, I would definitely want a 6 plus as my next phone.
As for the standard iPhone 6, it's more like a scaled up version of old iPhone software, so it is sort of the same experience as before. That combined with the fact that it doesn't feel as great to hold with one hand makes me feel that it is a bad screen size for me.
4 or 5.5 for me, nothing in between
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As I'm sure has been said, it all depends on hand size. I tried out the 6 plus in the store, and I could handle it just fine with one hand. But for some people its very different. I don't think they should just take away the option of a smaller phone. I have an iPod touch, and I like it because it is just so easy to handle, and it is super thin and super light (a millimetre thinner and about half the weight of the 6 plus) and for some people that would be fine, but I usually go to my iPad for most things, because it just doesn't work on that tiny 4-inch screen the way it does on the 9.7-inch screen. Apple and developers have done a great job putting iPad like features onto the 6 plus. if they keep that going, I would definitely want a 6 plus as my next phone.
As for the standard iPhone 6, it's more like a scaled up version of old iPhone software, so it is sort of the same experience as before. That combined with the fact that it doesn't feel as great to hold with one hand makes me feel that it is a bad screen size for me.
4 or 5.5 for me, nothing in between