I think this is the one that finally got both sims working. It took me months to find it. Let me know if it works for you. I think I had to load it by putting on a memory chip and loading it through boot loader. I had to rename it OP6BIMG and let boot loader find it. I have several that I tried, let me know if this works for you. As I recall, it took me several tries to get it right.