So, out of the many cards I have, I've only met one fake. This was my friend's card which she bought during the first couple days the DSi was released in JAPAN. The DSi was 1.0J when I saw it so out of stupidity, I updated to 1.4J to download browser and other new games she wanted. Unfortunately, the DSi couldn't read the cart after the update. So, I try updating the cart with all the firmwares on the list stickied to this section but none had worked. Then I try Wood, then YSMenu which both failed. Here are some picture of a real R4i Gold compared with the "R4i" that had worked with the DSi 1.0J. The first picture is a real original R4 (left) next to the fake R4i (right). Does anyone have any idea how to identify a seemingly "beta R4i" and use a working firmware for it?