Because everyone has one.
So what exactly is the thought behind needing to brag the text or email you sent me came from your iPhone? I don't care. It was kind of a given it had to come from somewhere. When you send it from your desktop or laptop it's not signed off with "sent from my iMac." or "sent from my 17" MacBook Pro."
You want me to be...what? Impressed? Nope. Flattered? Not really. Happy you can afford an iPhone? Yes. I'm very happy for you.
What I do care about is getting a text or email in a timely manner, and having a phone conversation that doesn't drop out every ten feet.
Based on my experience, I'm pretty sure no one with an iPhone is bragging about that.
