Xiaomi Mi Mix has Android 6.0 (Marshmallow), It offers an internal memory of 128/256 GB with 4&6 GB RAM, It presents a screen of 2K resolution, And it comes with a battery capacity of 4400 mAh .
Xiaomi Mi Mix specifications
General
6021 Announce date : October, 2016
6021 Release date : November, 2016
6021 Height × Width : 158.8 mm x 81.9 mm (6.25 x 3.22 in)
6021 Thickness : 7.9 mm (0.31 in)
6021 Weight : 209 g (7.37 oz)
6021 SIM : Dual SIM (Nano-SIM, dual stand-by)
6021 Colors : Black, White
6021 Build : Front glass, ceramic frame, back
Display
6021 Display type : IPS LCD capacitive touchscreen, 16M colors
6021 Screen size : 6.4 inches (~83.6% screen-to-body ratio)
6021 Resolution : 1080 x 2040 pixels [ 2K resolution ]
6021 Pixel density : (~362 ppi pixel density)
6021 Multitouch feature : yes
6021 MIUI 8.0/ 8.2 : yes
Camera & Video
6021 Rear camera : 16 MP, f/2.0, 1/3″, 1.0µm, PDAF
6021 Camera features : Dual-LED (dual-tone) flash, HDR
6021 Video : 2160p@30fps, 1080p@30fps (gyro-EIS), 720p@120fps [ 4K UHD video ]
6021 Front camera : 5 MP, f/2.2, 1080p@30fps
Memory
6021 Internal Memory : 128 GB with 4 GB RAM or 256 GB with 6 GB RAM
6021 RAM : 4&6 GB RAM
Battery
6021 Battery type : Non-removable Li-Ion
6021 Battery capacity : 4400 mAh
Platform
6021 Operating System : Android 6.0 (Marshmallow),planned upgrade to 7.0
6021 Operating System : (Nougat)
6021 Chipset : Qualcomm MSM8996 Snapdragon 821 (14 nm)
6021 Processor : Quad-core (2×2.35 GHz Kryo & 2×2.19 GHz Kryo)
6021 Graphics : Adreno 530
Network
6021 2G bands : GSM 850 / 900 / 1800 / 1900 – SIM 1 & SIM 2
6021 3G bands : HSDPA 850 / 900 / 1900 / 2100
6021 4G bands : LTE & LTE – India (Band 40)
6021 Speed : HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 Mbps
6021 GPRS : yes
6021 EDGE : yes
Sound
6021 Alert types : Vibration, MP3, WAV ringtones
6021 Loudspeaker : yes
6021 3.5 mm jack : yes
6021 Active noise cancellation with dedicated mic : yes
CONNECTIVITY
6021 WLAN : Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
6021 Bluetooth : 4.2, A2DP, LE
6021 GPS : yes, with A-GPS, GLONASS, BDS
6021 USB : Type-C 1.0 reversible connector
6021 Radio : FM radio
6021 NFC : yes
6021 Infrared port : yes
Features
6021 Sensors : Fingerprint (rear-mounted), Accelerometer, Compass, Proximity,
6021 Sensors : Gyro, Barometer, Ambient light sensor
6021 Messaging : SMS (threaded view), MMS, Email, Push Mail, IM
6021 Browser HTML5 : yes
6021 MP3/WAV/eAAC+/Flac player : yes
6021 XviD/MP4/H.265 player : yes
6021 Document viewer : yes
6021 Photo/video editor : yes
6021 Fast battery charging : yes (Quick Charge 3.0)
Xiaomi Mi Mix disadvantages
6021 Removable battery : No
6021 Protection for the screen : No
6021 Water & Dust resistant : No
6021 Temperature sensor : No
6021 Expandable memory : No