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By flashing a global ROM (such as the F8131 software), you essentially transform your Japanese carrier-locked device into a standard international Xperia X Performance. This removes not only the SIM lock but also the carrier-specific restrictions, bloatware, and network limitations that would otherwise prevent full functionality with non-au carriers.
The Sony Xperia X Performance (SOV33), the 2016 flagship released through au by KDDI in Japan, is a robust device featuring a Snapdragon 820 processor and a full metal body. If you are locked out of your device due to a forgotten pattern, PIN, or Google Account (FRP), using an is often a more effective and reliable solution than basic hard resets. Why FTF Flashing is Better for Lock Removal
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