Sony Xperia XZ2 Manual page 141

Enter password
Handset is connected.
The password, for a household wireless LAN router, is sometimes found on a sticker on the router
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(WEP, WPA, KEY, etc.). Contact the router manufacturer for information. For password for a public
wireless LAN, check with user's service provider.
Entering a password is not required if an access point is not security protected.

Connecting a WPS-Capable Device
In Wi-Fi settings,
Entry
xperia-xz2_10_Wi-Fi／Bluetooth(R).docx
5
CONNECT
Wi-Fi preferences
Follow onscreen instructions
Advanced WPS Push Button/WPS PIN