Here’s why Apple Upgrade requires AT&T, T-Mobile, or Verizon for iPhone

The new Apple Upgrade program has a key piece of fine print: “If you’re leasing an iPhone, you’ll need to connect to AT&T, T-Mobile, or Verizon when you enroll.” In a new post today, John Gruber at Daring Fireball has a likely explanation for this requirement.

Summary from the 9to5Mac feed. The full story lives on their site.