Sony SRS-HG1 Help Manual page 193

Note
Depending on the mobile phone, playback might not pause when receiving a call.
Use a mobile phone at least 50 cm away from the speaker. Noise may result if the speaker and the mobile phone are too close.
Related Topic
How to make a wireless connection with BLUETOOTH devices
Terminating the BLUETOOTH connection (After use)
Making a call
Button functions for a phone call
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