They were originally used for area codes (Wikipedia lists a UK example of 0AY6, ie 0296, for Aylesbury), then later for mnemonic numbers like the one from the article. Mobile phones inherited the lettered keypad from landlines and also started using it for typing text messages.
Wikipedia: The use of alphanumeric codes for exchanges was abandoned in Europe when international direct dialing was introduced in the 1960s, because, for example, dialing VIC 8900 on a Danish telephone would result in a different number to dialling it on a British telephone. At the same time letters were no longer placed on the dials of new telephones.
At any rate, the presence of lettered keypads doesn't mean people * had * to make mnemonic phone numbers with them, and it does look like (in Europe) only the UK had such numbers.
Apart from the US and UK, they might be popular in some Commonwealth countries too. I grew up in one and remember having them.
In the early automatic telephone years, letters were also used in the Netherlands, France, Denmark and other countries, but they fell out of use way before most people here were born, and also they were mostly (only?) used for area codes and exchange names/numbers, not subscriber numbers.
Letters are associated with numbers on a phone keypad. This is not a US-only thing. It is not a mobile only thing. It is not a land-line only thing. Keypads, all over the world, have letters on them. Letters (in the same way they are on phone keypads) can be seen on other numerical entry devices, like a keypad for a secure door.
As to pressing a number multiple times when texting, a half-second of thought would make it clear that this wasn't the case. Are you telling me it would be reasonable for OC (or anyone) to think that the NYT's phone number translated from
> 844-NYTNEWS
to
> 844-669998663397777
??
Indeed -- it dates back to the 1920s. At that time, phone numbers in the US started to be formed from a 2-letter exchange code followed by 5 (or sometimes 4) digits. For instance, "PEnnsylvania 6-5000" (dialled 736-5000) was the number of the Hotel Pennsylvania in New York City, and also the title of a 1940 hit song.
Still is!