@bastianallgeier I remember tweeting via SMS! I was studying abroad in Japan and had a simple flip phone, but I could still tweet on the go by texting!

Another fun part of Twitter weirdness history: it used to be (no longer is) that if your tweet started with an @, it wouldn't be visible to anyone else, which is why you still, to this day, see people who will start a tweet with a period before @-mentioning anyone.