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Back of the current smartphone lineup
Here you can see the back of the Samsung Galaxy Note II, HTC One, HTC Droid DNA, Apple iPhone 5, Nokia Lumia 920, and BlackBerry Z10.
Back of the HTC One
I don't think you will find another smartphone built like the HTC One.
HTC One and Droid DNA
The Droid DNA was my favorite HTC device, until now.