Sony SOV33 (Xperia X Performance, au variant) can have its screen lock removed by flashing an FTF (Flash Tool File)
. Using an FTF is often considered "better" than other methods because it can bypass locks without requiring the device to be in an unlocked state or have USB debugging pre-enabled, provided you can enter Flash Mode Why FTF is Often Preferred Total System Reset:
Flashing a stock FTF firmware completely overwrites the system partitions, effectively removing PIN, pattern, or password locks. No Password Required:
Unlike a factory reset from the settings menu, which requires the existing PIN, flashing via FTF only requires physical access to the device and a PC. Stability:
Using official firmware (FTF) ensures the device remains on its original software version or an official upgrade, avoiding the risks associated with third-party "unlock tools" that can corrupt firmware. Removal Process Overview
To remove the lock using an FTF file, you typically follow these steps: Preparation: Download and install and the necessary Sony drivers for the Firmware Acquisition: to download the official stock firmware and bundle it into an FTF file Flash Mode: Power off the device. While holding the Volume Down sony sov33 lock remove ftf better
button, connect it to your PC. The indicator LED should turn green, signifying it is in Flash Mode. Wiping Data: In Flashtool, select the firmware and ensure the
options (Userdata, Cache) are checked. This is the specific action that deletes the lock screen information.
Execute the flash. Once complete, the phone will reboot as a "new" device without a lock screen. Critical Risks & Considerations
Yes. In most jurisdictions, unlocking your own phone is legal. Japan passed laws allowing unlocking in 2015, though au makes it difficult. You are modifying your own hardware.
Since sharing copyright-protected firmware is legally gray, here are legitimate sources for patched files: Sony SOV33 (Xperia X Performance, au variant) can
0x1F4A2 in amss_fsg.sin.Do not trust random Google Drive links without verifying the file hash against a known good copy.
Since the SO-33J has a locked bootloader by default, you cannot back up TA keys without unlocking. However, for SIM lock removal only (not camera fix), you don't need DRM keys. Proceed, but know that unlocking the bootloader later will break some Sony proprietary features.
Yes. Simply download the SOV33 FTF from XperiFirm and flash it back. The lock will return, but you can re-flash the G8141 FTF again later.
Cause: Flashtool database lacks SO-33J signatures.
Fix: Manually edit C:\Flashtool\devices\G8XXX.properties. Add line: G8141 = SO-33J. Restart Flashtool.
The Sony SOV33 features a Snapdragon 820 and a 5.2-inch 1080p display. By modern standards, it is slow and the battery life is poor. XDA Developers Forum – Xperia XZ Premium Cross-Device
However, for the niche community of Walkman enthusiasts (who want the LDAC Bluetooth codec) and compact phone lovers, the SOV33 is a treasure. The “FTF lock remove” method is better because it respects the device’s age—it’s free, it fixes the radio properly, and it requires no recurring subscription.
Final Advice: If you are new to flashing, pay for the tool. If you are a hobbyist with a steady hand for test points and a copy of Flashtool, the FTF method is the only way to truly liberate the SOV33 from its Japanese carrier grave.
Disclaimer: Modifying your device’s firmware voids warranties and carrier agreements. This article is for educational purposes. Always ensure you have the legal right to unlock your device based on local telecommunications laws.
The Sony SOV33 is a Japan-exclusive variant of the Xperia XZ Premium, originally sold by the carrier au by KDDI. Because it is carrier-locked both in software and network terms, many users seek to remove the SIM lock or screen lock. While “removing the lock” can refer to either unlocking the device for use with non-au SIM cards or bypassing a forgotten screen lock (PIN, pattern, password), the most effective and permanent method involves flashing a customized FTF firmware file using Flashtool on a PC. This essay explains what an FTF file is, how it helps in lock removal, and the recommended procedure for a safer and better outcome.