Mi Band 3 was officially launched on late 2018. It was a much awaited product for gadget lovers and a sequenl to Mi Band 2. Myself use Band 3 for the past two years. Till now I have not faced any technical errors or program errors. Labeled as a Mi product, quality is just fabulous. Only who uses the fitness features of Band 3 will only get best impression. Others who uses it for normal purpose may not find Mi band 3 as unique. Now, Band 4 has launched with upgraded features.