: Look at the text printed on the plastic on the back of your Switch. Original unpatched units read HAC-001 . Your XKJ1 unit will explicitly read HAC-001(-01) .
In mid-2018, Nintendo and NVIDIA quietly updated the internal bootROM chip of the Switch console to fix a critical hardware vulnerability known as fusee-gelee .
These units are not vulnerable to the initial RCM (Recovery Mode) exploit found in the original V1 (unpatched) Switch units.
If you have recently acquired a Nintendo Switch Go to product viewer dialog for this item. is my switch patched xkj1 top
Yes, your Nintendo Switch with a serial number starting with is definitely The "XK" prefix indicates that your console is a v2 "Mariko" model
console, the easiest alternative is to look for a used, on secondhand marketplaces like eBay or Facebook Marketplace. Be sure to explicitly request a photo of the console's serial number sticker from the seller before buying so you can cross-reference it against the Is My Switch Patched database.
with a serial number starting with , your console is 100% patched . This means it is entirely immune to the famous "unpatched" software exploits that rely on Recovery Mode (RCM). : Look at the text printed on the
, which has a more efficient chip and better battery life, but it comes at the cost of being "patched" at the factory. How to Confirm Your Switch Serial Number
“If the serial has ‘TOP’ next to it, that means it’s the top quality build and might be unpatched.” Fact: “TOP” is a factory assembly code. It has zero correlation with patched status. Both unpatched and patched Switches have carried “TOP” labels.
Was this guide helpful in determining your Switch's status? If you're considering a modchip installation, Share public link In mid-2018, Nintendo and NVIDIA quietly updated the
You must solder incredibly tiny wires directly onto the console's capacitor points around the APU.
Crucially, because this is a hardware-level flaw in the processor's bootrom, it cannot be patched with a simple system software update.
The community has gathered extensive data on millions of serial numbers to provide a definitive answer. According to the primary community-driven guide on GBAtemp, which is considered the most accurate resource, the verdict is clear:
A Switch with serial XKJ1 is almost certainly patched against the Fusée Gelée hardware exploit (RCM hack). Unpatched units are generally found in serials up to XKJ7000xxxxxx (early 2018). XKJ1xxxxxxx indicates a significantly later build.