mobiles6.com We help you to hard reset your phone
Here’s the tutorial to solve the problems of your device & To unlock the device when you forgot Pattern,Pin,Password,& Fingerprint.
NOTICE: before you start to hard reset your phone, do the backup of your personal data in your SONY Xperia Z4 Tablet WiFi.
How to Reset SONY Xperia Z4 Tablet WiFi
Download program named flashtool from Sony website:
Then check, that you have installed drivers for your USB data cable.
First you should download PC Companion, in example from here:
Now press Call button, and type: *#*#7378423#*#*
Then you will see menu.
From this menu choose option Customization Settings -> Reset customization.
Confirm information: “data will be cleared and factory data reset will perform”.
Accept with pressing Reset customization and reboot.
Please be patient -> your device will reset and reboots.