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DevilsBreathProtect

Y9 Prime 2019

Huawei · catalog updated 2026-10-21

All supported devices
Brand
Huawei
Kind
Android phone · released 2019-08 · last update Android 10
Model codes
STK-L21, STK-L22, STK-LX3

Ships with EMUI 9.1 (Android 9) and Google Mobile Services; install the EMUI 10 (Android 10) update first. It did not get EMUI 10.1 or later. The same codes are used by the Y9s, STK-L21 also by the P smart Pro and STK-L22 and STK-LX3 also by the Honor 9X, so confirm the model by name. No built-in gesture or key opens a chosen app: knuckle gestures (where present) only take screenshots or record the screen, and double-pressing Volume down only takes a photo or opens the camera.

Gestures on the Y9 Prime 2019

No gesture specific to this model is known. We only list what the manufacturer or reliable sources document.

Plus what the app offers on every Android phone: In-app button, Widget, Quick Settings tile, Shake, Volume keys, Voice phrase. How to set those up

Recommended presets

  • Shake ×3Sends a signal

    Three sharp shakes within 2.5 s: hard to do by accident, easy to do without looking.

    Shake ×3, 0.15–1 s apart · whole gesture within 2.5 s

  • Widget ×2Sends a signal

    Two taps on the home-screen widget within 3 s; a single accidental tap does nothing.

    Widget ×2, 0.1–3 s apart · whole gesture within 3 s

Gestures are set up in the phone settings as shown, then combined into a trigger recipe in the app, where practice mode shows step by step whether a gesture would trigger.