Apple iPhone 5S, AT&T, 16GB - Space Gray (Refurbished) Renewed products look and work like new. These pre-owned products have been inspected and tested by Amazon-qualified suppliers, which typically perform a full diagnostic test and a thorough cleaning process. Packaging and accessories may be generic. This product is backed by the Amazon Renewed 90-day guarantee. This product is only compatible with the GSM carrier AT&T. It will not work with any other service provider. The phone requires a nano SIM card (not included in the package).