SOS is · · · — — — · · ·: three dits, three dahs, three dits, then a pause, repeated. Rescuers recognize the rhythm — a human waving a light rarely keeps it, but the app's automated timing is exact every cycle, which is precisely what makes the pattern read as a distress call rather than a flicker.
How to send an SOS Morse-code signal with your phone flashlight
SOS in Morse — three short, three long, three short — is recognized worldwide, and light carries it much farther than your voice at night. Your phone's LED can flash it perfectly, tirelessly, for hours. Worth setting up before you ever need it.
01The signal, and why timing matters
02Using SOS mode
- Open the app and choose SOS
- Pick LED flash, screen light, or both
- Start it, then point the light toward roads, buildings or search parties
- Elevate the phone if you can — line of sight is everything at night
03Make the battery last the night
An LED flashing a duty-cycle pattern draws far less than a torch burning steadily — SOS mode can run for hours. Stretch it further: enable battery saver, kill the screen between checks, and consider signaling in bursts (ten minutes on, five off) once you know help is searching. The app's timer can auto-stop a session so a pocket press doesn't drain you.
04Beyond SOS: messages in light
The Morse toolbox goes past emergencies: flash custom text as Morse with the LED, or scroll it visibly on the LED board — the screen becomes a moving illuminated sign, handy for concerts, road assistance ("CALL 112"), or finding your group at a festival. Fun to learn Morse with, too.