Cover image via arstechnica.net
1. It has a brand new 20 Megapixel camera on the back and a 4 UltraPixel camera on the front
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2. It has a faster processor
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3. The battery life has been given a slight boost
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4. The M9 looks almost the same as its predecessor, the M8
The iPhone on the left for comparison together with the HTC One M8 in the centre and the HTC One M9 on the right.
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