Seems new. I still dunno why Apple made it such a secret.

Drove me bonkers when my carrier claimed I sent an SMS but my phone showed I had not.

Edit: others reported that there’s a message that said “Your Carrier May charge for SMS messages used to activate iMessage” that would still send even if you hit “Cancel”.

Seems like a lot of providers don’t charge for this SMS, but for those that do, it can be a costly int’l SMS.