Mine list:
1. Improved rear camera, 13-Megapixel sensor like the Samsung galaxy s4 , plus the aforementioned flash upgrade
2. Fingerprint sensor, integrated fingerprint sensor to replace the need for usernames and passwords on the phone.
3. New design, bigger screen than the iPhone 5. In my eyes, 4.5 inch is perfect.
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For most of people, I think 5 inch is too large to handle . So may be 4.5inch-4.7inch is perfect. 🙂