For those looking to buy the iPhone 6s and 6s Plus unlocked, Apple has started selling SIM-free variants of both handsets. The unlocked version of the iPhone 6s has the model number A1633, while the 6s Plus is A1634.

From Apple:

The SIM-free iPhone comes without a wireless contract commitment or carrier financing. It doesn't come with a nano-SIM card for iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, or iPhone 5s. And because it's unlocked, it isn't tied to one carrier, so you can get a nano-SIM from any supported carrier worldwide, such as AT&T, T-Mobile, Verizon, or Sprint in the United States.

You can also use the device on a wide variety of international carriers.

The caveat here is that going SIM-free entails full upfront payment for the phone, with no carrier incentives available. Here's how much you'll be shelling out for the new iPhones:

iPhone 6s:

  • 16GB - $649
  • 64GB - $749
  • 128GB - $849

iPhone 6s Plus:

  • 16GB - $749
  • 64GB - $849
  • 128GB - $949

Buy SIM-free iPhone 6s at Apple

Buy SIM-free iPhone 6s Plus at Apple

iPhone 6s buyers guide