How to Send an SOS With Your Phone Flashlight
SOS is the internationally recognized distress signal — three short flashes, three long, three short, sent as one continuous group with no letter gaps. MorseLight flashes it from your phone with a single tap.
Steps
- Install MorseLight free from Google Play.
- Open the Send tab.
- Tap the red SOS button to flash ··· ——— ··· on a repeating loop.
- Aim the flashlight toward whoever might see it and hold the phone steady.
- Tap the button again to stop.
Features
- One-tap SOS on a repeating loop
- Works offline — no signal or data needed
- Adjustable flash speed
- Uses the bright camera flash
What SOS means
SOS (··· ——— ···) was adopted because the pattern is simple, symmetrical, and hard to mistake for anything else. It is not an abbreviation — it is a single distinctive signal that reads the same forwards and backwards.
When to use it
Use a flashlight SOS only in a genuine emergency — when you are lost, stranded, or need to attract attention and other communication has failed. If you have any signal at all, call your local emergency number first.
Tips for being seen
Keep line of sight to where help might come from, get to higher or more open ground if it is safe, and aim the flashlight rather than waving it. Flashing uses far less battery than a constant beam, so an SOS loop can run for a long time.
Frequently asked questions
What is the SOS signal in Morse code?
Three dots, three dashes, three dots (··· ——— ···), sent with no gaps as a single group.
Does the SOS button work without internet?
Yes — the flashlight runs entirely on-device, so it works with no signal or data.
How far can a flashlight SOS be seen?
On a clear night with line of sight, a phone flashlight can be visible over a surprising distance. Aim it steadily toward potential rescuers rather than sweeping it around.