When AppleMusic shows offline, the reason is that the Bluetooth headset has been disconnected from the iPhone. It happens in the following situations: your device or earphone is low in power, the distance between devices is too far, and other interference factors cause signal interruption. To solve this problem, please reconnect the Bluetooth headset and iPhone. Open the settings menu, find your headset in the Bluetooth option, and click Pairing again. Unable to establish a stable connection, be sure to keep the mobile phone and earphone close, and check whether there are other interference sources (such as large metal objects) that affect signal transmission.