My original 3DS is currently on 4.3.0-10E mainly because this is the last supported firmware for my AK2i but also because I want to keep the exploit used by 3DS cards. I do not own any 3DS flashcard at the moment but I plan on getting an MT-card (or maybe a Gateway 3DS if they get stop attacking consumers) when the homebrew scene becomes a bit more active. My question is. If I get Animal Crossing: New Leaf, will this game upgrade my 3DS to a newer firmware? I want to keep my firmware up to 4.5 for when the time comes and I get a 3DS flashcard.