Sony SRS-ZR7 Help Manual page 148

If your smartphone is changed to the standby mode by a magnetic reaction, it might not connect with the speaker by one touch (NFC). Use the
smartphone without the NFC function. For details, refer to the operating instructions of your smartphone.
When connecting your NFC-compatible device with using the NFC function, be careful not to touch the FUNCTION button and -/+ (volume)
buttons at the same time with the device.
Related Topic
Disconnecting the NFC-compatible device by one touch (NFC)
Switching devices by one touch (NFC)
Listening to music on a device via a BLUETOOTH connection
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