Samsung is currently makes the total package. The best blend of screen size, power, and performance. And this is why Apple should follow suit. Thinking about the size of the phone alone is short sighted. If Apple had a bigger phone, they could fit a bigger battery. This alone has tons of beneficial effects on user experience. For one, it would be their foray into 1080p displays. Let's be honest, there is no reason for a measly 4" phone to have a high def display. And without one they will be left behind the major competitors. Then when you factor in Apple finally releasing high quality internals (like a quad core CPU and more powerful GPU) it makes you wonder why they don't just admit their fault and build a larger iPhone. Honestly, the battery is indirectly the biggest reason why iPhone lags behind Android in every way.