Xiaomi Mi 4s offers high-end specifications and many interesting features. It is equipped with two SIM card slots that can accommodate different providers at the same time. You are free to manage them according to your needs whether it’s for voice communication or data connection purpose. The phone looks pretty stylish with a full HD display dominating the front panel. The 5.0″ IPS LCD display has a resolution of 1080 x 1920 pixels (441 ppi pixel density) which is quite high for its size. It has the capacity to deliver great viewing experience. You can view high quality visuals and get wider viewing angles too. The responsive touchscreen allows you to navigate through menus easily. It already supports multitouch. Standard features like MIUI 7.0, Accelerometer, Gyroscope and Proximity sensor are available. Xiaomi Mi 4s is installed with Android v5.1 (Lollipop) operating system. Looking inside, a Hexa-core (4×1.4 GHz Cortex-A53 & 2×1.8 GHz Cortex-A57) processor is paired with Adreno 418 GPU and 3 GB of RAM. The processing speed is quite impressive. It works so fast that you can do most tasks more effectively. Apps can load quickly and you can switch menus smoothly. You won’t find any disturbing delay that can ruin your mood. Multitasking shouldn’t be a problem at all. 4G LTE connectivity is definitely an advantage since you’ll be able to enjoy faster data speed. To store your files, it provides 64 GB of internal storage. To expand the storage capacity you can use SIM 2 slot. It accommodates external memory card up to 256 GB. The phone has a variety of connectivity features including Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot; Bluetooth v4.1, A2DP; Infrared port; and USB Type-C 1.0 reversible connector. On the rear side of the phone, you can find a brilliant 13 MP camera. It has many supporting features such as f/2.0 aperture, phase detection autofocus, dual-LED (dual tone) flash, Geo-tagging, touch focus, face/smile detection, panorama, HDR mode and HD video recording capability. A secondary 5 MP camera with f/2.0 aperture is attached on the front panel. The quality is good enough to please selfie fans. The pictures look sharp and has sufficient amount of details. You can also use it to make video contents for your vlog. Other included features: Fingerprint sensor (rear-mounted), Compass, Fast battery charging: 40% in 60 min (Quick Charge 2.0), Active noise cancellation with dedicated mic, GPS with A-GPS and GLONASS/BDS, Email, Push Email, Instant Messaging, HTML5 browser, MP3/WAV/eAAC+/FLAC player, MP3/WAV/eAAC+/FLAC4 player, Document viewer, Photo editor, Video editor, Voice memo, Voice dial and more. Dimensions: 139.3 x 70.8 x 7.8 mm (5.48 x 2.79 x 0.31 in) Weight: 133 g (4.69 oz) Xiaomi Mi 4s Master Reset Method 1. From Main Menu go to Settings. 2. Find Backup and Reset option. 3. Select Factory Data Reset. 4. Tap Reset Phone. 5. Select Erase Everything.