The first text message in history said "Merry Christmas".
Why it is true
It was sent in December of nineteen ninety-two by a computer engineer to the director of a telecommunications company in the UK, using the GSM network.
Source: Telecom History
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.