I see it argued a lot here when discussing Apple Watch (here and below i⌚ for brevity) limitations that "it's not an iPhone on your wrist". Let's remember how Steve introduced iPhone: Today, we're introducing three revolutionary products. The first one is a widescreen iPod with touch controls. The second is a revolutionary mobile phone. And the third is a breakthrough Internet communications device. So, three things: a widescreen iPod with touch controls, a revolutionary mobile phone, and a breakthrough Internet communications device. An iPod, a phone, and an Internet communicator. An iPod, a phone...are you getting it? These are not three separate devices. This is one device. And we are calling it iPhone. Today, Apple is going to reinvent the phone. Facts: 1. i⌚ is an iPod. You can store and play music on it. 2. i⌚ is a revolutionary mobile phone (you just need to carry an auxiliary SIM "delegate" called iPhone) 3. i⌚ is an Internet communicator. Twitter, Instagram, Facebook, etc. (these and other apps dependent on Internet are, in essence, more usable versions of a web browser for specific tasks) And if Apple allowed it, somebody could write a tiny web browser for it. Q.E.D. i⌚ ***is*** a miniature iPhone on your wrist. It's just that you need to carry an auxiliary battery with powerful CPU and antennas attached to it to fully enable its communication functions. TL;DR - If you're talking to your wrist and browsing Instagram photos and such on your wrist, the fact that it does't have its own SIM does not make it "not an iPhone on your wrist" - just not very capable and standalone one.