Setting the scene
Early GSM design treated short messages as low-priority control-channel traffic, not a consumer product. Keypads assumed numeric entry, so T9 predictive text and character limits shaped how people wrote once phones shrank.
What happened
Carriers initially priced texts aggressively relative to bandwidth, which accidentally trained users to compress meaning into abbreviations. Regulatory fights later targeted spam and premium-rate scams built on the same pipes.
Why it still matters
Smartphones eventually routed attention to richer apps, but SMS stayed resilient during disasters when data networks congested. Memorable detail: Papworth typed the message on a computer keyboard because phones could not yet compose texts easily.
Background
SMS later became a billing cash cow, a two-factor authentication channel, and a meme grammar of its own.