French phrase
Mon appareil est en mode avion.
Meaning
My smartphone is in airplane mode.
When to use it
A smartphone is set to airplane mode. This concise statement can be used in casual or neutral situations when contact is unavailable.
Example dialogue
Pourquoi tu n'as pas répondu ?
Why didn't you reply?
Mon appareil est en mode avion. Je répondrai dès que possible.
My smartphone is in airplane mode. I'll reply as soon as possible.