I got this blue R4i cart when I bought my now useless DSi.. I don't know where compony of R4 did it came from since the seller gave it to me free when I bought his DSi. If you touch the sticker on it's front, you will feel a rectangle thing in it. I think it is the chip... The memory card with it has Moonshl2.. I tried different firmwares like wood kenel (since it is great on my another R4 and all new games works fine on it) but the R4i doesnt work with all the firmwares I tried other than the one already installed to it's memory card. I think the R4i is fake.. It's firmware is good though. it has music player and skype and multiply, but I haven't tried any of it yet, and if the skype will work, I think it's useless now since my DSi is already updated and only using it on my DS Lite. can anyone tell me what kind of r4 did I get and what firmware will work fine on it?? and also it says v1.45 instead.. but the blue r4i I found in the internet only says v1.41 on it's sticker.. also the edges on the bottom are all curvey.