A: To perform a hard reset on your Sony Xperia Z, follow these steps: Make sure your phone is turned off. Press and hold the Volume Up button. While holding the Volume Up button, press and hold the Power button until the device vibrates. Release both buttons when you see the Sony logo appear on the Read the below steps and enter the hidden mode of Android 4.1 Jelly Bean. Let's use the secret menu of SONY Xperia Tablet Z LTE SGP351. At first turn off the device by holding the Power key for a few seconds. After that plug the Micro USB cable into your PC or laptop. Now hold down Volume Up and connect the Micro USB cable with the tablet. The SONY XPERIA Z ULTRA ( C6802 / XL39h / C6833 / C6843 / C6806) will continue the step until ready to use in clean factory default. #Option 2, Hard Reset SONY XPERIA Z ULTRA ( C6802 / XL39h / C6833 / C6843 / C6806 ) with Flashtool applications: Flashtool in the applications from Sony can be download from Sony website. Hard reset z2 verizon Hard Reset z2 . As has been raised in the comments, that Sony devices do not support hard resetting. The above links provide those methods while I have indeed myself been able to reset sony xperia z4 and the c5. Attached is the method I used to hard reset those devices. #Option 3, Hard Reset SONY XPERIA S LT26i with Hardware Key Button: Make sure the battery fully charge; Do not forget to backup all important data; Turn off the SONY XPERIA S; Press and Hold together: Power Button + Volume Up Button for several seconds; Follow the menu at LCD screen to continue the hard reset SONY XPERIA S 9uDcyT.

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