Why doesn't the band vibrate to remind after I've set the incoming call reminder?

You need to keep the Bluetooth on when setting the incoming call reminder. First, check whether the mobile phone Bluetooth is turned on and connected to the band. Second, for non-MIUI systems, the incoming call reminder requires Amazfit App to keep running in the background. To avoid process cleanup or intercept performed by one-click memory cleaners or some management software in Android systems, you may add Amazfit App to the self-starting whitelist. For the setting method of different mobile phone systems, please refer to "Help"-> "Amazfit Background Running Permission Settings" for more information.