Warning: The Sony Xperia 5 II is no longer maintained. A build guide is available for developers that would like to make private builds, or even restart official support.
Special boot modes
Recovery: With the device powered off, hold Volume Down + Power.
Bootloader/Fastboot/Download: With the device powered off, hold Volume Up and connect the USB cable. The notification light should turn blue.
Find help online
Note: This page is auto-generated for the Sony Xperia 5 II, based on the device’s information, located here. You can find similar instructions for every officially-supported device on this wiki.