
Apple Upgrade hinges on major US carrier deals, Gruber explains
Apple's iPhone Upgrade program requires enrolling the device with AT&T, T-Mobile, or Verizon—driven by exclusive carrier deals and risk controls with those major partners; the iPhone remains unlocked and can be switched, but prepaid plans are not allowed. Gruber's post on Daring Fireball offers the explanation and notes it's part of a strategy to motivate carriers and curb fraud.













