3. Longer Battery Life
Apple takes the battery life of a device very seriously. Every successive device launched literally has, as a given, an improved battery life. iPhone 4S sported a 1400-1420 mAh battery yet, many users found it difficult to survive the day with a moderate to heavy usage. The new iPhone's battery would need to up the ante by a hefty value to be able to handle high-end graphic performance demanded by most apps. Apple is known to be the best at integrating the software and hardware features of their devices. It's not like Android phone manufacturers have cracked the puzzle of high performance with long battery life. But at least they handle the heavy drainage by supplementing the hardware with a bigger, better battery. And, we expect Apple to provide us with some extra juice in the new iPhone's battery so that we can make through two days (being optimistic) on a single charge.