
Apple today updated its U.S. online store to begin offering sales of unlocked, SIM-free iPhone 5s models, with shipping estimates currently set at 1-2 weeks compared to 3-5 business days for carrier-specific purchases (via 9to5Mac). Pricing is the same as for other unsubsidized iPhone 5s models, with the 16/32/64 GB models available for $649/$749/$849 respectively.

With today's addition, the company is now more clear about offering unlocked models without the need for any SIM card to be included at the time of purchase, with the models available for use on a number of carriers around the world.
As Apple notes on the store page, unlocked iPhone 5s devices are model are A1533 and are compatible only with GSM networks.
Article Link: Apple Begins Offering Unlocked, SIM-Free iPhone 5s Models in U.S. with 1-2 Week Shipping