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.
When the community says a Switch is "patched," it specifically refers to a hardware-level vulnerability in the console's boot process. All unpatched Switch consoles are V1 models (the original version released in 2017) that contain a specific hardware flaw in the Nvidia Tegra X1 chip.
If you have an XKJ1 Switch and want to run custom homebrew or custom firmware, you have two primary paths forward: Option 1: Install a Physical Modchip is my switch patched xkj1 top
Summary
Insert the jig in the right rail, hold Volume Up + Tap Power. Connect to a PC. If your serial starts with XKJ1 and the
Enhanced battery life compared to the 2017 V1 model.
(like the RP2040/Picofly), which requires professional micro-soldering skills. All unpatched Switch consoles are V1 models (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 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?