a)Check battery level: If you cannot connect, make sure your Amazfit Bip is fully charged. Place your device on the charger base for 10 minutes, remove from the charger base and try connecting again.
b)Force quit and reopen Mi Fit app
c) If it doesn’t sync, close the app and turn off/on the Bluetooth on your phone, reopen the app and try connecting again.
d) Reboot your phone
e) Uninstall/Install mobile application:
f) Android: Erase Bluetooth cache and data
Go to Setting ➡ Application Management ➡ More Application ➡ All ➡ Bluetooth Shared ➡ Clear Data
iOS: Go to phone settings to find Bluetooth setting and then remove the Amazfit device. To do so, tap on the icon next to the Amazfit and tap Forget this device. Toggle Bluetooth OFF and ON. Re-open App and try connecting again.
Note: Please keep away from other Bluetooth devices when connecting.