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Please read this if you considering unlocking the boot loader or rooting your phone.

Important information

Please note that you may void the warranty of your phone and/or any warranty from your operator if you unlock the boot loader. You should only unlock the boot loader of your phone if you are an advanced user with good knowledge of the technology and risks involved.

For more information go here

Please also note

The Sony Xperia support team will not be able provide any support, related to unlocking the boot loader or rooting your phone.

We also recommend you to read the below blogposts.

Best regards
Sony Xperia support team

USB driver not working on fastboot mode

Message 1 of 1
Message 1 of 1

USB driver not working on fastboot mode

I have tried the Xperia XP Premium driver on several (3 different machines with Win 8.1 and 10) Windows devices. Which means EMMA can't see the phone and you can't flash to latest firmware.

NONE of them can recognise the Xperia XZ Premium in Fastboot mode. Can't you get the firmware images and flash them with the fastboot CLI program? No problem with flashing images on Ubuntu.