Xiaomi launched the Mi Smart Band 4, successor of last year's Mi Band 3 in India earlier this week. The upgraded version has a larger color AMOLED full-touch display with unlimited watch faces, and several features including music and volume controls, Swim tracking with stroke recognition and more. I have been using the latest fitness band from Xiaomi for about a month now, here is the review. Box contents Xiaomi Mi Smart Band 4 device Black silicone wrist band Charging cable Quick start guide Design and Build The Band 4 has the same elliptical design as the Mi Band 3, but the touch button below the screen is slightly smaller than the predecessor. It weighs 22.1 grams, slightly heavier, but you won't notice it since it's just 2 grams more. The dimensions should be same, since both the bands are similar. It has a polycarbonate body, similar to Mi Band 2 and 3. It has 5ATM water resistance, so you can even wear when swimming. There is 3-axis accelerometer + 3-axis gyroscope sensor, and Bluetooth 5.0 compared to Bluetooth 4.2 in the predecessor to connect to Android and iOS devices. Since the Bluetooth chip is programmable, so it can store data even when it is ...