Huawei
Volume Key Shortcut for Accessibility Features auf Huawei
The volume key shortcut sits inside the accessibility menu of EMUI. Once active, holding both volume buttons for three seconds triggers a feature you have picked in advance, without opening any app first.
To check or change it, open Settings ➔ Accessibility features ➔ Accessibility ➔ Accessibility shortcut. Toggle Accessibility shortcut on or off and confirm with OK. This master switch decides whether the button combo does anything at all.
Below it you find Allow when screen is locked. Leave this off and the shortcut only works once the phone is unlocked. Turn it on and the same button hold also works from the lock screen, which is useful if you rely on TalkBack before entering a PIN.
Tap Select feature to pick which tool actually opens, for example TalkBack, colour correction, or magnification. If no feature is selected, the shortcut stays silent even when the switch is on.
If holding the volume buttons only changes the ringer or media volume, the shortcut itself is disabled or not assigned, not broken hardware.