Sony Reader PRS-T3 Series User Manual page 26

If an access point's SSID (Service Set Identifier) is private, enter Wi-Fi connection
information manually.
The access point may filter access by MAC address. Check the MAC address by
pressing the (Home) button tap [Applications] [Settings] [About]
[Device Information], then register the MAC address with the access point to
establish a Wi-Fi connection.
When you are connected to a Wi-Fi network, you can also display speed, security
and other Wi-Fi network details by pressing the (Menu) button and tapping
[Connection Information] in the [Wi-Fi Settings] screen.
An access point, once configured, can be connected to again simply by tapping it in
the [Wi-Fi Networks] list and tapping [Connect].
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