Required to use the Festival Plaza, GTS, and Wonder Trade.

: Select the CIA file and choose Install and delete CIA . This saves space by removing the installer after the update is applied to the system NAND.

This is the most common method for users with custom firmware like Luma3DS.

Before diving into the install process, let’s understand why updating is non-negotiable for serious players. The 1.2.0 update (commonly referred to as "Update 12" in shorthand) addresses: