U.S. customers can now buy the iPhone 5s without a SIM. This has been an option for iPhone customers outside the United States since launch, and the closest you could come in the U.S. is buying an iPhone 5s off contract with a T-Mobile US SIM. But you can now use a SIM from any carrier you choose, provided that it's GSM-compatible. Like all off-contract iPhones, the SIM-less iPhone 5s starts at $649 for 16GB, and ships in one to two weeks.
Source: Apple
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