I've finally found a way to install this hack on real hardware, here's a small tuto :
Using V9 version of HackingToolkit3DS and a cia rom of Picross E9 (can be converted with GM9), extract the CIA file, replace everything from the romfs and banner archives and rebuild the CIA.
Then install the...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.