Skip to content
DevilsBreathProtect

X4 (2019)

LG · catalog updated 2026-10-21

All supported devices
Brand
LG
Kind
Android phone · released 2019-02 · last update Android 8
Model codes
LM-X420N

Korean version of the K40, announced in February 2019. Ships with Android 8.1 (later units with Android 9). Whether it got Android 10 is not known; the AT&T K40 did. No built-in gesture or key opens a chosen app. No Android update is documented, so this is the version it shipped with.

The app can't run on the X4 (2019)

Its last official update is Android 8, and the app needs Android 10 or later.

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.