Infinix Hot 40 Pro

Transsion · catalog updated 2026-10-21

Brand: Transsion
Kind: Android phone · released 2023-12
Model codes: Infinix X6837

Ships with XOS 13 (Android 13) (Techweez). Hot 40 series announced 10 December 2023 (FoneArena) and launched in Kenya the same month (Techweez). The Quick Start link comes from Infinix's XOS-wide documentation, not a source about this model.

Gestures on the Infinix Hot 40 Pro

Draw one of the designated letters on the screen while it is off

DocumentedInput: Screen-off gesture

Requires: XOS 13 or later (Infinix documents it among the XOS 13 features)

Set it up

Settings
Search for "Quick Start"
Assign one of the letters to an app
Quick signal: gesture

Infinix's XOS page lists 'Quick Start': 'Quick launch apps by drawing designated letters on the off screen. You can also customize which apps can be opened this way.' TechGenyz (April 2026) says XOS can open apps by drawing letters even while the phone is locked. Our sources give neither the menu location nor the list of letters, so the steps use Settings search. Older XOS versions had reassignable letter gestures, but our sources for that are from 2015 to 2020. Whether our entry opens over a secure lock screen is not confirmed. The gesture only works with the screen off, so drawing it again requires locking the screen first. It is not linked to Smart-series phones (entry models, some on Android Go edition), because no source covers them.

Sources

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
Letter gesture + shake ×2Sends a signal
A letter drawn on the dark screen must be followed by two sharp shakes, so neither a stray touch in a pocket nor a bump fires on its own.
Screen-off gesture ×1 → then within 8 s: Shake ×2, 0.3–2 s apart · whole gesture within 12 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.