: All XKJ serial numbers belong to the V2 (Mariko) hardware revision.
The XKJ1 Top model refers to a specific revision of the Nintendo Switch, released in 2019. This model is characterized by its top PCB (Printed Circuit Board) design and is often associated with improved stability and performance. is my switch patched xkj1 top
Step 6 — Definitive but technical check (requires advanced tools) : All XKJ serial numbers belong to the