In old Nokia phones, the standard notification tone for an SMS (text message) was simply ‘M’ (for message) in Morse code. The “Special” tone when receiving an SMS was Morse code for “SMS”. – WTF Fun Facts
Text message
WTF Fun Fact – Divorce Via Text
In 2003, Malaysian courts ruled that a man could divorce his wife via text message, as long as it was clear and unambiguous. The case included the following text message sent by Shamsudin Latif: “If you do not leave your parents’ house, you’ll be divorced”. – WTF Fun Facts
Source: BBC NEWS | World | Asia-Pacific | Malaysia permits text message divorce