Pairing Cannot Be Done - Sony WH-XB910N Help Manual

Help Guide
Wireless Noise Canceling Stereo Headset
WH-XB910N

Pairing cannot be done.

Bring the headset and the Bluetooth device within 1 m (3 feet) from each other.
The headset automatically enters pairing mode when pairing for the first time after purchasing, initializing, or
repairing the headset. To pair a second or subsequent device, press and hold the
for 5 seconds or more to enter pairing mode.
When pairing a device once again after initializing or repairing the headset, you may be unable to pair the device if it
retains pairing information for the headset (iPhone or other device). In this case, delete the pairing information for the
headset from the device and pair them again.
Restart the connected device such as a smartphone or a computer you use, and pair the headset and the device
again.
Reset the headset.
Initialize the headset, and pair the headset and the device again.
Related Topic
How to make a wireless connection to Bluetooth devices
Resetting the headset
Initializing the headset to restore factory settings
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(power) button of the headset