Install the "Flashmode" drivers. The most reliable way is to install the Sony Xperia Companion.
Extract the Newflasher tool files into that same firmware directory. download newflasher v20
Newflasher is cross-platform, supporting Windows (x64/i386), Linux, Android, and Darwin (macOS). Step-by-Step Guide: How to Use Newflasher Install the "Flashmode" drivers
You can remove carrier-specific bloatware by flashing a generic global firmware. supporting Windows (x64/i386)
Delete all .ta files from the main firmware folder and the /boot subfolder to avoid potential errors.
Useful for US owners who want to flash a different regional firmware to re-enable features like the fingerprint sensor or get faster security updates.
You can upgrade or downgrade major Android versions without needing to unlock your bootloader or root your device. Prerequisites Before Downloading