Ulefone Power was released in December with Android 5.1 pre-installed, when Ulefone promised it would be upgraded to Android 6.0 in February. From February 7 to 13, China will on the Spring Festival Holiday, so the final Marshmallow version of Ulefone Power will come after that.
In the video we see there are still virtual menu, home and power keys on the display Ulefone Power, which are not necessary and occupy effective displaying space. Ulefone says the physical keys will be deleted in the final version.
Besides, Marshmallow is said to be 30% more energy effective than the Android 5.1, giving us hope that the 6050mAh mammoth battery of Ulefone Power will offer longer using time.