As indicated yesterday, Apple has begun selling unlocked, SIM-free versions of the iPhone 6 and iPhone 6 Plus on its U.S. online store.

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Pricing for the SIM-free versions of both phones are the same as the other unsubsidized models. The 16, 64, and 128 GB versions of the iPhone 6 are sold for $649, $749, and $849 respectively, while the 16, 64, and 128GB configurations of the iPhone 6 Plus run $100 higher than the aforementioned iPhone 6 models.

The SIM-free versions of the iPhone 6 and 6 Plus are the same as the full-priced, carrier-specific models that have been sold by Apple since the launch of both phones. For example, the iPhone 6 models offered by T-Mobile have been unlocked since launch, although it is unknown why Apple chooses to advertise both. The SIM-free and T-Mobile versions of the iPhone 6 can be used with a number of GSM carriers around the world, as a user only needs to provide a compatible Nano SIM for cellular connectivity.

All storage capacities and colors of the SIM-free iPhone 6 and iPhone 6 Plus are shown as ready to ship within 3-5 business days. The phones are also expected to be offered at Apple's retail locations starting today.