Apple iPhone 5S 16GB GSM Unlocked, Silver (Refurbished) Professionally inspected and tested to work and look like new, and backed by the 90-day Amazon Renewed Guarantee. Box and relevant accessories (no headphones included) may be generic. GSM Unlocked Phones are ONLY compatible with GSM carriers like AT&T and T-Mobile as well as other GSM networks around the world. They WILL NOT WORK with CDMA carriers like Sprint and Verizon (Search for "Fully Unlocked iPhones" for CDMA compatible iPhones).