Sony NYSNO-10 Help Manual page 4

Unable to connect the main unit to a BLUETOOTH device with one-touch connection (NFC)
Unable to make the device registration (pairing)
Unable to make a BLUETOOTH connection.
A passkey input is required on the display for the BLUETOOTH connection.
Calling
No voice from callers
Others
The main unit does not operate properly.
The main unit gets hot.
Resetting / initializing the main unit
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