Once finished, tap and wait for the device to reboot. Using Xperia Companion

The last major maintenance updates were distributed around early 2016. Method 1: Official Update via Device or PC

If your device is still running an older version like Android 4.4 KitKat, you can still attempt to update through official channels. Over-the-Air (OTA) Update

If your phone is stuck in a bootloop or you need to flash a specific regional firmware, you can download the files. Updating Sony Xperia Z Ultra to official Android 5 Lollipop

Connect to a stable Wi-Fi network and ensure your battery is above 50%. Go to > About phone > Software update . If an update is available, tap Download .

The official software support for the Xperia Z Ultra has concluded. The final official build released by Sony was . Final Build Number: 14.6.A.1.236

The Sony Xperia Z Ultra remains a beloved giant in the world of phablets. Whether you are looking to restore its original performance or breathe new life into it with a modern Android version, finding the right is essential. Official Software Status

Select in the application and follow the prompts. Method 2: Manual Firmware Download (Stock ROM)