Factory unlocked iPhones are GSM models and 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, Verizon and the likes. The phone requires a nano SIM card (not included in the package).
Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon. Certified Refurbished products are tested and certified to look and work like new, with limited to no wear, by a third-party refurbisher.
The refurbishing process includes functionality testing, cosmetic inspection, and repackaging. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. The product ships with a charger and cable, but does not include headphone, manual or SIM card. Accessories may be generic and not directly from the Manufacturer.
There may be minor scuffs and scratches on the iPhone. It's nothing that a case or cover can't hide.