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T-Mobile HTC One (M9)
The T-Mobile HTC One (M9) was announced on March 1, 2015, as a successor to the HTC One M8. On the exterior, it keeps much of the styling of the M8, while making a number of improvements on the internals. The M9 features a 5" SuperLCD3 1920 x 1080 display, 32GB internal storage, with up to 128GB available via microSD, and a 2840mAh battery, which features fast-charging technology. It is powered by a 64-bit 2GHz octa-core Qualcomm Snapdragon 810 processor and 3GB of RAM. The M9 rear camera has a 20.7MP sensor, with dual flash and 4K video at 30fps. The front facing camera features the camera taken from the HTC One M8, giving it a 4UP sensor, with HDR and 1080p video.
On the outside, the M9 features HTC's Boomsound speakers, with 5.1 surround sound effect, developed in partnership with Dolby, which also features in headphone audio.