The K4 Note sees a significant upgrade in terms of design and build quality, when compared to its predecessor. The device now features a metal frame and a polycarbonate plastic backing, which makes the phone feel sturdy and solid in the hand. The combination of dual-front facing speakers and a fingerprint scanner just below the camera makes the K4 Note aesthetically similar to the Lenovo Vibe X3, which isn’t really surprising, given that this device has been released in some markets as the Vibe X3 Lite.The K4 Note comes with a 5.5-inch IPS LCD display, with a Full HD resolution, resulting in a pixel density of 401 ppi. Under the hood, the K4 Note comes with an octa-core MediaTek MT6753 processor, clocked at 1.3 GHz, and backed by the Mali-T720MP3 GPU and 3 GB of RAM. There is also a version with 2 GB of RAM, You get two microSIM card slots here, and you can pre-select which SIM can be used to for calling, texts, and data. The option you select for data will allow for access to 3G/4G LTE, while the other sticks to EDGE.The K4 Note comes with dual front-facing speakers – which is always the best placement for speakers – with Dolby ATMOS features. While these speakers don’t get as loud as I would have liked, you get a rich stereo sound which further enhances the video-viewing and gaming experiences.The K4 Note comes with a 3, 300 mAh non-removable battery, that allows for really good battery life. I was able to consistently get up to 5 hours of screen-on time with the device, and an impressive stand-by times means that the device easily lasted through a full day of use, and sometimes even two, depending on my usage. The Lenovo K4 Note features a 13 MP rear camera with a f/2.2 aperture, and a dual LED flash, along with a 5 MP front-facing unit, also with the same aperture.On the software side of things, the K4 Note is running Android 5.1 Lollipop out of the box, but there is now an official update to Android 6.0 Marshmallow immediately available after you first set up the phone.