Hello. I ordered this phone Oukitel K4000 plus on the official website of the online store Newfrog, during Global Shopping Festival 11.11 it cost about $ 100, I have been using for almost a year. Although the manufacturer is little known to me, they bribed the phone’s technical characteristics and price. This is the 2017 model. The phone came in the mail quickly and without problems. I ordered in black. The build quality is up to par. The back cover is plastic. The metal silver side frame looks stylish. The front panel is covered with protective glass, rounded at the edges. Under the screen is a combined mechanical Home button and a fingerprint scanner. The back cover is removable, under it opens access to the slots for two SIM-cards and a memory card. Non-removable battery. The kit comes with a transparent silicone case with a dot relief pattern that fits the case tightly. Also on the screen is already pasted a protective film. A smartphone with 2 Gb of RAM and 16 Gb of flash-memory is enough. Great camera for the price. 4G catches in the city perfectly. Battery K4000 Plus 4100 mAh, lithium-ion. Battery charge in normal use is enough for 2 days. Great budget phone, no glitches. The package also includes: Micro-USB cable and charger 5V / 1.5A. I recommend this smartphone model. Have a nice shopping!