I was in high school when the first iPhone came out. Before any of us got a smartphone I had a friend who knew T9 so well that she could type out an entire SMS

I was in high school when the first iPhone came out. Before any of us got a smartphone I had a friend who knew T9 so well that she could type out an entire SMS to someone while in class without looking at the screen. So she would reach down in her pocket and pick up her phone and she’d be holding the phone by her side and she’d be typing out a message but she’d be looking at the blackboard, the teacher, and her desk while typing so you couldn’t even tell that she was typing from where the teacher was standing. I found that pretty impressive. I asked her about it and she said it was no biggie, she’d just been typing a lot and therefore she had learned how to do this without really trying to learn it.