I have an R4i Upgrade v1.4 (NDSi/NDSL/NDS) from www.R4I-SDHC.com . I tried using the 3DS (whitelist downgraded and patched TWL_FIRM so it should work no matter what.) and DSi v1.4.5 and DS Lite and it gets stuck on the loading screen. I've tried emailing them but no response apart from try formatting again. I've also verified the code on the back and it is real