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If the smartphone is in a case, remove it.
NFC reception sensitivity varies depending on the smartphone. If the connection repeatedly
fails, connect/disconnect by operating the smartphone.
You cannot establish a one-touch connection (NFC) while charging the battery, because the
headset cannot be turned on. Finish charging before establishing the one-touch connection
(NFC).
You cannot establish a one-touch connection (NFC) when the headphone cable is connected to
the INPUT jack. Remove the headphone cable before establishing the one-touch connection
(NFC).
Check that the connecting device supports the NFC function.
Check that the Bluetooth function of the smartphone is turned on.
Unable to make a Bluetooth connection.
Check that the headset is turned on.
Check that the Bluetooth device is turned on and the Bluetooth function is on.
If the headset automatically connects to the last connected Bluetooth device, you may fail to
connect the headset to other devices via the Bluetooth function. In that case, operate the last
connected Bluetooth device and disconnect the Bluetooth connection.
The Bluetooth device is in sleep mode. Cancel the sleep mode.
The Bluetooth connection is terminated. Make the Bluetooth connection again.
In case that the pairing information for the headset has been deleted on the connected device,
pair the headset with the device again.
Distorted sound
Keep the headset away from a microwave oven, Wi-Fi device, etc.
The Bluetooth wireless communication range is short, or the
sound skips.
Set the headset to “Priority on stable connection” mode. For details, see “About the sound
quality mode”.
Remove any obstacles between the antenna of the connecting Bluetooth device and the built-in
antenna of the headset. The antenna of the headset is built into the part shown in the dotted
line below.
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