it all depends on what leak your stuck in. He's on 210 wish means that he can i use Matts utility to go back to 211. You can do this only if your on leak 206 or higher. In theory if your on 84 or 85 it should work as well but I've never tested doing that with does so i don't recommend. Anything lower to 84 you would have to use Matts utility to go back to gb and then o t a to 211. This is because the older ics leaks used the same bootloader as g b. But starting on 84 they started using a different one.