Upgrade an iPhone for one generation jump is a waste of money. You can't really appreciate the difference.
Likely it has the same design, or if it's different (like 4S to 5) it wouldn't show you that huge of speed jump.
I have an iPad Air and iPhone 4S and you know what? In term of UI interfaces I can't really notice too much difference. Yep heavy apps load faster and runs smoother on my Air. But to get most things done, the difference is negligible.
Me? I'd save the money and upgrade every 3 or 4 years. I stood by my 4S until the 6 comes with bigger display and significantly speedier processor and more exciting features. Now that's an upgrade!
Likely it has the same design, or if it's different (like 4S to 5) it wouldn't show you that huge of speed jump.
I have an iPad Air and iPhone 4S and you know what? In term of UI interfaces I can't really notice too much difference. Yep heavy apps load faster and runs smoother on my Air. But to get most things done, the difference is negligible.
Me? I'd save the money and upgrade every 3 or 4 years. I stood by my 4S until the 6 comes with bigger display and significantly speedier processor and more exciting features. Now that's an upgrade!