To be 100% certain, you need the (visible in system settings: Settings → System → Serial Information ). Use the following known-safe range:
Before you can check anything, you need to find your console's serial number. It's printed in a few key places:
To put it simply, . Consoles with this serial number are not vulnerable to the original software-based RCM exploit and cannot run custom firmware without a hardware modchip.
If you are looking at your console’s serial number and wondering if you can install custom homebrew apps, back up your games, or explore the world of Switch modification, understanding your hardware is the essential first step. Below is an in-depth breakdown of what an serial number means for your console, how it differs from older models, and what options you have going forward. 1. What Does "Patched" Mean?
prefix indicates that you have a "Mariko" unit, also known as the is my switch patched xkj1 top
consoles originally shipped in a , unlike the white box with a hand graphic used for V1.
The sticker on the back of the Nintendo Switch contains several pieces of information:
Are you interested in learning about what are possible once a Switch is successfully modified? Share public link
user wants a long article about how to check if a Nintendo Switch with serial prefix XKJ1 is patched or not. I need to provide a comprehensive guide. I'll follow the search plan as outlined. The first step is to run the initial searches to gather information about the patched status, serial numbers, and the XKJ1 prefix. I'll also open the ismyswitchpatched.com website. I'll search for the queries as specified. initial search results provide some information. For example, result 0 from chip.de might be a German guide. Result 1 from gbatemp.net might have a list. Result 3 from psXtools.de mentions that XKJ is patched. Result 5 from Practical Tips also says XKJ1 is patched. Result 2 from the ismyswitchpatched search also indicates XKJ1 is patched. Result 3 from the bootrom search might explain the vulnerability. Result 5 from the hardware revision search might provide context. I also opened ismyswitchpatched.com, which shows the checker. However, to get more detailed information, I need to open specific pages. I will open the "Switch Informations by serial number" thread (result 0 from search 1) and the "Practical Tips" article (result 0 from search 2). GBAtemp thread shows discussion about XKJ serials. The Practical Tips article states that XKJ1 is patched. I also need to search for "XKJ1 patched" and "ismyswitchpatched xkj1" to get more specific results. I'll also search for "switch serial checker XKJ1". search results confirm that XKJ1 is patched. I have enough information to write the article. I will structure it with an introduction, what "patched" means, the RCM exploit, how to find the serial number, checking if a Switch is patched (including manual checks and using the website), what to do if the Switch is patched (modchip vs. buying unpatched), and a conclusion. I will cite the sources appropriately. Now I will write the article. rise of the homebrew community has made the question “Is my Switch patched?” one of the most common for Nintendo Switch owners. The console’s serial number is the key to answering this, as it reveals the hardware inside. If you have a serial number starting with XKJ1 , the answer is definitive. To be 100% certain, you need the (visible
If your serial starts with XKJ1 and the label also says "TOP", your Switch is still patched. The "TOP" mark is irrelevant to exploit viability.
If you want to double-check your console manually without looking at the sticker, you can easily tell a V2 (XKJ) console apart from a V1 by its physical design and packaging:
These prefixes are exclusively assigned to the newer "Mariko" V2 hardware revision .
The key to the original software-based hack is a hardware flaw known as . This unpatchable vulnerability exists in the bootROM of the Nvidia Tegra X1 chip found in early Switch consoles. Hacking group ReSwitched, led by Katherine Temkin, discovered this flaw in early 2018. Consoles with this serial number are not vulnerable
consoles are patched against the known unpatched v1 exploit (Fusee Gelee) 2. Can it be hacked? Software Method (RCM):
How to Double-Check Your Switch (Don't Trust Just the Serial)
If you are looking to jailbreak your console, dump game backups, or explore homebrew software, understanding what this serial number means is crucial. Below is a comprehensive breakdown of why the prefix is patched, how it differs from older models, and what your options are moving forward. Why Is the XKJ1 Prefix Definitely Patched?
Are you looking to homebrew your console, or were you just checking for general maintenance?
"The bad news," he muttered to his dog, who was unimpressed, "is that the old RCM jig trick won't work here."
: Because the hardware exploit (Fusee Gelee) is patched on these units, you