Here is the scatter text format typically used for the firmware (e.g., for SP Flash Tool or similar).
When the scatter file loads but flashing fails at preloader, you may need to force BROM mode: bg2-w09 firmware scatter
This comprehensive guide will walk you everything you need to know about scatter files, why they are essential for unbricking the BG2-W09, where to find them, and how to use them safely using tools like SP Flash Tool. Here is the scatter text format typically used