It is one of the Futile fitness band which I have ever used in my lifetime.Its battery drains out very quickly just below 30% .It Only has a feature for declining call, no feature for answering the call have been added to it.The step counter feature of Mi Band 4 is too inaccurate.Like any other band, this band also counts too many false steps.By the time I reach the club in my car, it shows me 1.5KM or more, but the actual walk is less than 0.5km, So better forget this feature.The weather feature has not been added to the home screen which band 3 used.Sometimes it does not shows notifications.If you try to update a custom theme than it will give you a message to connect to mi fit app update and this will really irritates you and to solve this you have to unpair your band and sync again.Some of the limitations of Mi Band 4.
1) .PRICE - Mi band 4 is very costly.Not everyone can afford to buy this.It costs rs2300 to buy MI band 4.
2) .BATTERY LIFE - It’s battery life is pathetic.Its battery drains out very quickly just below 30% .It comes with an very low battery life of just 135mah.
3) .COMPATIBILITY - Mi band has compatibilty issues with many phones, your phone should have bluetooth 4.0 and android version 4.4 and above, it means you cannot use it with old phones.
4) .OTHER FEATURES - You have to keep your bluetooth switched ON all the times when you want to live track your fitness, and the device does not synchronize fast with the phones ( Sometimes) .
5) .LOOK AND FEEL - The device module and strap have chances of getting detached during sporting activity, which always keeps you in being careful about the device every now and then when you engage in sports activity which is very annoying.
I STRICTLY RECOMMEND NOT TO PREFER Xiaomi Mi Band 4