Bigbluemenu and Dev Menu
Bigbluemenu and Dev Menu
Here are the files you will need to install the mset_<region>.cia from your SD card. Then you can boot into Gateway mode with the classic System Settings DS Profile method for Gateway 3DS Ultra 3.2
BigBlueMenu .3ds and .cia /Dev Menu .3ds
https://mega.co.nz/#!KhBjCKDZ!x4bRSR2xT ... 9Cs3SVbhmI