Turn on SONY Xperia Z Ultra C6833 phone and connect to WiFi network. Go to Settings --> Security --> turn on unknown sources. Open Chrome browser and type address download.hardreset.info. Open directory sony them root and download aplication HardReset.info_kingroot.apk.
How to hard reset SONY Xperia 10 III. At the very beginning switch off your phone by using the Power key. After that push and hold Volume Down and Power button for a short while. Release the Power button when the smartphone vibrates and keep pressing the Volume Down solo. In the appeared Recovery mode go to Wipe data/factory reset.
Check this link for more details.https://www.androidtechtips.com/You can easily Hard Reset Sony Xperia Z android mobile here. You can also unlock Sony Xperia
What is fastboot mode on SONY Xperia Z Ultra C6833? Start by switching off the mobile phone by holding the Power rocker. In the next step press and hold Volume Down, and connect your device to USB cable. After a while you should be in the expected mode. Success!
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