An update for some Mi Band 4 owners has arrived bringing some a couple of neat features. The new software version is V1.0.9.48 and lets you share your heart rate data with other devices or applications and re-designed display settings in the app on the phone allows you to rate watch faces in the store. The heart rate sharing bit isn't exactly new as it has been around ever since Mi Band 3 but Xiaomi later removed it from the Mi Band 4 feature list. We are happy to see it return as some prefer other fitness-related apps instead of being forced to use the Mi Fit app. The band can even...