I have just found my old 3ds, turned it on and it's firmware is 2.1.0-3U Just tried to load arm11.bin to get OTP file, but the bottom screen write "arm11.bin loading" and i couldn't load OTP helper. I tried so many time, clear history and cookie, use another SD,... but it's not working. Anyone know about this stupid error? Or 2.1.0-3U fw couldn't get OTP file, only 2.1.0-4 fw could? Sorry because of my bad english.