A short history of SMS, and why it refuses to die

In December 1992, a 22-year-old engineer named Neil Papworth sent the first SMS from a computer to a phone. It said "Merry Christmas". The phone could not reply, because handsets did not yet have a way to compose one.

Thirty-four years later, SMS is still the only messaging system that works between any two phones on earth without either party installing anything or creating an account. Every attempt to replace it has succeeded partially and universally failed to finish the job.

The 160-character accident

The limit that shaped a generation of writing was not a considered product decision. Friedhelm Hillebrand, working on the GSM standard in 1985, typed out a series of ordinary sentences and questions on a typewriter and counted the characters. Most came in under 160.

That was the research. The number was chosen because it fit into the spare capacity of the signalling channel that phones already used to communicate with towers: the control chatter that keeps a handset connected. SMS was, quite literally, built in the gaps.

This origin explains almost everything about the protocol. No encryption, because signalling data was not confidential in the threat model of 1985. No delivery guarantees, because it was a best-effort side channel. No rich media, because there was no room.

Nobody expected anyone to use it

Carriers considered SMS a minor engineering feature. Early handsets could receive but not send. Business plans assumed it might be useful for voicemail alerts.

Then teenagers found it. By the late 1990s, text messaging was a cultural phenomenon in Europe and Asia, and carriers discovered they were charging per message for data that used capacity they had already built and were not otherwise selling. SMS became one of the most profitable products in the history of telecommunications, by accident, twice over.

The long decline that never finished

From 2010, every trend line pointed at SMS's death. WhatsApp, iMessage and their peers offered free messages, group chats, images and eventually encryption. Person-to-person SMS volume collapsed in most markets.

And yet.

SMS is the universal fallback. It is the only channel where you can message a number without knowing whether the person uses your app. That property has no substitute.

It requires nothing. No account, no installation, no compatible device. A fifteen-year-old handset receives SMS.

It works when nothing else does. Signalling channels reach further than data. In poor coverage, a text sends when a chat app spins.

Institutions standardised on it. Banks, doctors, airlines, delivery companies and government services all reach you by SMS, because it is the only address they can be certain works. Two-factor codes alone have kept it alive for a decade.

SMS lost the conversation and won the infrastructure. Your friends left. Everything important stayed.

What your SMS inbox looks like now

This is the transformation nobody named. For most people, SMS is no longer a place where friends talk. It is where the institutional world arrives:

Appointment confirmations
Delivery notifications
Payment reminders and invoices
Two-factor codes
And, inevitably, the fraud that follows all of the above

Which is to say: your SMS inbox stopped being social and became administrative. It is now one of the highest-density sources of time-sensitive, structured information on your phone, and it is still displayed as an undifferentiated chronological list, exactly as it was in 1995.

Why we started here

Textly began as an SMS app, and that was not nostalgia. It was that the channel everyone had written off had quietly become the one carrying the most actionable information, and the one where scams do the most damage, precisely because institutions trained everyone to trust texts from unknown numbers.

The other channels came later, because the fragmentation problem is real. But SMS remains the foundation, for the same reason it has survived everything else: it is the only one that is always there.