Xiaomi has released new software updates for the Mi Band 3 and Mi Smart Band 4 (aka Mi Band 4 in China) that now lets you unlock your laptops with the smart bands without having to install a third-party app on your smartphones. Initially this feature is only available for the Indian users and you can only unlock laptops running Windows 10 OS. Mi Smart Band 4 The new updates also improve the step counter to prevent the fitness bands from recording ghost steps. You first need to update the Mi Fit app on your smartphone to install the new firmware on your Mi Band 3 and Mi Smart...