Are you one of the VERY FEW people still on stock firmware? Forget stock firmware! You should install Custom Firmware and arm9loaderhax! Here are some very good reasons to do so. The install is easy. The install is extremely easy. Most of the consumed time consists of downloading files and waiting for NAND backups to be made or restored and the ctrtransfer to be made. At most the install took me 1 and a half hours. Game cart dumps. This is arguably one of my favorite features of Custom Firmware. Say that your father gives you a 3DS Game Cart and says that you have to share it with a sibling. You could dump the Game Cart to an installable CIA file and give the Game Cart to your sibling. GBA Games on 3DS. You could argue, "Oh, but ambassadors had access to 10 FREE GBA games!" Yes, but ONLY the ambassadors. Unfortunately, for people that purchased the Nintendo 3DS after the ambassador program ended, they could no longer get the games. Now, with the Ultimate GBA VC Injector, you can actually play ANY GBA game on your 3DS! The emulator that Nintendo built for this actually works quite well. I will not provide ANY sources for GBA ROMs. I encourage you to rip the ROM from the GBA Game Cart using a DS and a flashcart, but you may get them however you feel is necessary Piracy... This is one of the sadder things about CFW. With the ability to dump any Game Cart and install it to your HOME Menu, there also come the pirates. People basically rip eShop games or Game Carts, upload them to filesharing sites like MEGA, and then post the links to download them on websites. People here on GBAtemp commonly refer to one of these very sites as "that ISO site." There is also a tool that people have exploited to pirate games called freeShop. I won't provide any links because I am not one to pirate a good game. I would rather support the developer by trying a demo (if available) and if I liked the demo, then I would purchase the game, but do whatever you want. Your favorite Homebrew apps - Directly on your HOME menu. You want to access a Homebrew app, but don't want to go through SoundHax or HBLauncher_Loader with the possibility that the system will hang. So you open your CIA installer of choice and install the CIA of that exact app. With CFW, you have faster access to your favorite Homebrew apps like never before. Game mods. If you want a new and unique experience in your games, then installing CFW will give it to you! With various mods like CTGP-7 for Mario Kart 7 or the various mods for Super Smash Bros. for Nintendo 3DS on Gamebanana, the expansions you could make to your game are practically endless! Custom HOME Menu themes. With CFW and tools like CHMM2 or the Howling Theme Tool, you can have custom themes directly on your HOME Menu. They are VERY different in the way that they work, so make sure you take a look at both of them! You can download custom themes at 3DSThem.es or make your own from scratch using Usagi 3DS Theme Editor. It's Homebrew that Nintendo can NEVER take away from you. I remember when Nintendo patched TubeHax. I was really upset. But with CFW, you have Homebrew on your system permanently. You can perform a Firmware update (It's safe to update while on CFW with a9lh, stop asking.) and you will still have your CFW. I hope this thread gave you a little insight into some of the benefits of CFW and a9lh. If anyone feels the need to expand on this list, they can do so by making a reply. If this thread made you want to install CFW, first make sure you are on System Version 11.2.0-35X or lower, where X means the letter of your region. If you are on 11.2.0-35X or lower, you can follow 3ds.guide to install Luma3DS Custom Firmware. MAKE SURE YOU FOLLOW THE GUIDE TO. THE. LETTER! DO NOT, UNDER ANY CIRCUMSTANCES, SKIP ANY STEPS! If you are on 11.3.0-36X, then you cannot install CFW. Sorry. The reason for this is that downgrading was patched on 11.3.0-36X, and a downgrade is necessary to install CFW and a9lh.