I used to keep one on my keys back when I worked at a carrier store selling phones. Made life so much easier then.
In fact, the actual inserted part broke off years ago (and I haven’t done phone sales in over a decade), but the main part of the body is actually still attached to my keyring. I haven’t even thought about that until this post, actually.
It’s ironic that Europe adopted SMS years before we did in America because texting was absurdly expensive here. I remember paying $0.25/SMS back in 2003 or so (it dropped to a comparable bargain of $0.10/SMS after you sent 20 messages in a month), plus we had to pay to both send and receive them. I remember having to pay my parents $20/mo extra just to have unlimited SMS/MMS on my line only a couple years later once I was old enough to get a job.
I’m surprised that Europe kept up per message charges for MMS so long, they were basically always billed at the same rate as SMS here.