Mi band 3 can save mobile phone data for several days without links.

General data can only be saved for 7 days, so it is recommended to synchronize in time. The operation method is as follows:

1. First, open the "Xiaomi Sports" app on your mobile phone and click the "Add Device" button at the arrow.

2. Then "select the binding device" and click the "bracelet" at the arrow to start binding the mi band.

3. The box shows "Searching, please put the bracelet near the mobile phone". Just put the bracelet and the mobile phone together.

4. After waiting for a period of time, the bracelet will start to vibrate. Click the button on the bracelet at this time.

5. Click the tentacle ring to confirm the binding, and the system will prompt "Binding succeeded", as shown by the arrow.