: If your bootloader is already unlocked, Sony provides this professional tool to flash official software versions. 2. Community Favorite: Flashtool (Androxyde)

Most users use this tool alongside to download and flash specific firmware (FTF files) for the Go to product viewer dialog for this item. (models E2303, E2306, E2312, etc.). Drivers: You must install the specific Xperia M4 Aqua drivers for your PC to recognize the phone in "Flashmode".

The flash tool is just the installer; you also need the "content" to install. You need to download the specific firmware file for the Xperia M4 Aqua. These files have the extension .ftf .

Note: As of 2024-2025, version numbers may have changed. Always download the latest stable release.

Before diving into the download links, it is essential to understand what a flash tool does. In the world of Android, "flashing" refers to the process of writing new data to the device's internal storage (specifically the system partition).