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Ensure your device has at least 50% charge to prevent it from powering off mid-process.

Flashing a stock ROM will erase all user data , including photos, contacts, and apps.

To get a and safe firmware file, it is highly recommended to use XperiFirm , which downloads official files directly from Sony's servers.

Use a high-quality USB Type-C cable to maintain a stable connection.

You must have the Xperia XZ Premium Drivers installed on your PC. Step 1: Download Official FTF Firmware

The remains a powerhouse for enthusiasts, but software issues like boot loops or the desire to downgrade from Android Pie to Oreo often require a clean install of the official stock ROM. Using an FTF (Flash Tool File) with the community-standard Flashtool is the most reliable way to restore your device to its factory state. Prerequisites Before Flashing