The HTC One M9 was released on April 10, 2015.
The HTC One M9's screen resolution is 1080x1920 pixels, 441 ppi pixel density.
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Yes, there is a version of the HTC One in black.
It's possible that the HTC One M9+ can work in some US market's LTE bands (GSM). You can look here on specific bands it supports. Since this phone is being sold outside of the US, it's safe to assume it will work at most locations around the world.
M9 paper
The HTC One is already available to Verizon, and comes in the different variants (stock Android OS, Android OS with Sense, Windows).
No. The HTC One M8 is longer and wider than the original HTC One.
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m9 paper
Yes, the HTC one and the HTC one Harman Kardon one are the same size.
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HTC phones are not all the same size. HTC phones come in various sizes. The HTC One is 5.41 x 2.69 x 0.37. In comparison, a smaller phone is the HTC Desire 4.69 x 2.36 x 0.47 in size.