Click the "Lightning Bolt" icon, select "Flashmode," and choose your firmware.

However, the specific string "0691epubl hot" looks like a legacy file naming convention or a specific archived upload tag rather than a standard software version. Because this often involves modified firmware or third-party hosting sites, it's important to navigate this carefully.

Wipe specific data caches or exclude certain "sin" files from a flash to keep your data while updating the OS. How to Use FlashTool Safely

Certain "one-click" root kits were built specifically to trigger off the architecture of version 0.6 series. Key Features of FlashTool

Install official Sony firmware without needing Sony Bridge or PC Companion.

Developed by Androxyde, FlashTool is an open-source solution that allows users to flash .ftf (Flash Tool Firmware) files onto Xperia devices. It operates using the device's "Flashmode" (usually triggered by holding Volume Down while connecting to a PC). Decoding "flashtool 0691epubl hot"

Here is a comprehensive guide on what FlashTool is, how that specific version fits in, and how to use it safely.

When prompted, power off your phone. Hold the Volume Down button and plug in the USB cable. The LED should turn green, indicating Flashmode.