What is "Stealth Mode,"?

[GameLord2011]

I was digging through the source code, trying to find out how to swap out the sd card icon on the status bar with the floppy disk icon, and stumbled upon this code snippet in desktop.c:

// Stealth mode icon 
desktop->stealth_mode_icon_viewport = view_port_alloc(); 
view_port_set_width(desktop->stealth_mode_icon_viewport, icon_get_width(&I_Muted_8x8)); 
view_port_draw_callback_set( 
    desktop->stealth_mode_icon_viewport, desktop_stealth_mode_icon_draw_callback, desktop); 
if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagStealthMode)) { 
    view_port_enabled_set(desktop->stealth_mode_icon_viewport, true); 
} else { 
    view_port_enabled_set(desktop->stealth_mode_icon_viewport, false); 
} 
gui_add_view_port(desktop->gui, desktop->stealth_mode_icon_viewport, GuiLayerStatusBarLeft); 

I found several code references to stealth mode, but no settings referencing it.

[GameLord2011]

I found this:

    bool stealth_mode = false;

In desktop_view_lock_menu.c

[GameLord2011]

nvmind figured it out

[Willy-JL]

It's to mute led and sounds. On ofw it's a menu entry in the lock menu. On momentum it's when you click the volume bar