As the vibrations cover a wide area of the screen, the user is able to hear clear voice quality regardless of which part of the ear they place the device on.
Earlier today, a Sina Weibo user posted the above photo of said phone with its back cover -- between the two plastic lines -- removed, thus exposing not only its two SIM card slots but also a microSD slot just below the camera.
That's great news as I prepare for my upcoming trip to Spain to cover Mobile World Congress (I leave tonight), since my habits as a power user will be amplified during my weeklong venture to the other side of the Atlantic.