Apple is now selling SIM-free, unlocked versions of the iPhone 6s and iPhone 6s Plus in its online store. This option lets users purchase a phone without immediately tying it to a carrier. The SIM-free iPhones do not come with a nano-SIM card — you have to get a card from a supported carrier. Customers will pay full retail price for these options, of course, which range from $649 for an unlocked iPhone 6s to $949 for a 128GB SIM-free iPhone 6s Plus.…
