Joke Collection Website - Public benefit messages - SMS password used in Apostles.

SMS password used in Apostles.

That's Morse code.

Morse code was invented by American Samuel Morse in 1844. The earliest Morse code was dots and dashes representing numbers. Numbers correspond to words. You need to look up a code table to know the number corresponding to each word. You can delete dots, dashes and pauses with one click.

There is an introduction on the internet, so you can check it.