Sony XBR-55X900B - Manual (Page 163)

To optimize the One-touch mirroring function (for
experts)
When the standby screen for Screen mirroring is displayed, press the
OPTIONS button, then select [Optimize One-touch mirroring].
[Off]: Normally use this option. It uses the same wireless channel at
2.4GHz as the wireless router (or access point) is using.
[Auto]: This option uses a wireless channel that may improve video
streaming quality. When you select this setting, the wireless connection
between the TV and the wireless router (access point) is disconnected
during One-touch mirroring, therefore communication via the Internet
(such as an incoming call) is stopped.
When your TV is connected to a wireless router (or access point) at
2.4GHz, you can optimize the wireless connection for the One-touch
mirroring function.
Notes
For connection with Xperia, release the screen lock of Xperia, then touch.
For the position of the NFC detection area on the smartphone, refer to the
instruction manual of the smartphone.
If the TV cannot recognize and connect with the smartphone, try again.
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