Production yields for the iPhone 5S are known to be low but thanks to our iPhone 5S locator, we hope to help you track down your new phone. We will continue to update this list after September 20th:

iPhone 5S 16GB
Amazon
Apple
AT&T
Best Buy
Sprint
T-Mobile
Verizon

iPhone 5S 32GB
Amazon
Apple
AT&T
Best Buy
Sprint
T-Mobile
Verizon

iPhone 5S 64GB
Amazon
Apple
AT&T
Best Buy
Sprint
T-Mobile
Verizon