We compare the two latest Xiaomi bands to help you decide

Xiaomi’s line of Mi Band fitness trackers are among the most popular wearables in the world, and that can make deciding between them a difficult task.

The family of smart bands is now four generations deep, with the Mi Band 3 and the Mi Band 4, the most recent additions to the Band clan.
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https://www.wareable.com/xiaomi/xiaomi-mi-band-4-vs-mi-band-3-7485