As always, DroidReport assumes no liability for rooting your device. Proceed with caution.
Before Getting Started
This guide is for the Sony Xperia Z2 (D6503) only. Flashing any other device through this method may result in a bricked phone.
As always, you want to backup your device since this root method will likely wipe all data. Charge your Xperia Z2 to at least 80 percent before proceeding.
Ensure that you have up-to-date USB drivers installed and connect your Xperia Z2 to your computer. Finally, enable USB Debugging mode by navigating to Settings -> Developer Options.
How To Root Sony Xperia Z2 (D6503) Running Android 4.4.2 KitKat
1) Connect your Xperia Z2 to your computer via USB.
2) Download SuperSU, which can be found here. Copy the zip archive to the root folder of your phone’s SD card.
3) Create a backup of your device.
4) Unplug your Xperia Z2 and shut it off.
5) Boot your phone into Recovery Mode by turning it on and pressing down the Volume Up button when the green LED activates.
6) Navigate to “install zip from sdcard” and select the SuperSU file copied earlier. Confirm your selection by pressing the Power button.
7) Do nothing until the process is complete.
8) Once installation is complete, return to main menu and reboot the phone.
9) Your phone will restart, which may take a few minutes the first time.
10) Once your phone restarts, you will officially be rooted. Kudos.