Interesting for me is that my iPhone 4 is much faster than my iPhone 5S. And the battery lasts much longer on my 4. I think what Apple changed these days is t

Interesting for me is that my iPhone 4 is much faster than my iPhone 5S. And the battery lasts much longer on my 4. I think what Apple changed these days is that the latest version of iOS works both on 5+, while I remember my iPhone 4 was stuck with old version and I was never able to upgrade it.