Six
Learn to type braille on your phone’s screen. Six fingers, one chord for each letter.
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How you’ll hold the phone
Lessons run with the phone turned sideways. Sound needs the silent switch off. Each letter has its own chord: top dots sound high, bottom dots low, and with headphones each hand plays in its own ear. On a computer, F D S are dots 1 2 3 and J K L are dots 4 5 6. Press the keys of a chord together, and H to hear the chord.