A. 1. Restart your smartphone and the JBL PartyBox. This can help refresh the connection. 2. Ensure that your Bluetooth is turned on and that the PartyBox is in pairing mode. 3. Go to the Bluetooth settings on your phone, forget the JBL PartyBox, and then try to reconnect it. 4. If the issue persists, uninstall the app, restart your phone, and then reinstall the app from the Google Play Store.
B. 1. Check for any additional updates for the app in the Google Play Store and install them. 2. If the app continues to fail to connect, consider resetting the PartyBox to factory settings by holding the power button and the Bluetooth button simultaneously until the device resets.