Locked to the GSM network and only compatible with GSM carriers like AT&T, T-Mobile and Metro. Will not work with Sprint, Verizon, US Cellular or Cricket.
The device does not come with headphones or a SIM card. It does include a charger and charging cable that may be generic, in which case it will be UL or Mfi (Made for iPhone) Certified.
Inspected and guaranteed to have minimal cosmetic damage, which is not noticeable when the device is held at arms length.

4.7-Inch (diagonal) widescreen LCD multi-touch display with IPS technology and Retina HD display
Splash, water, and dust resistant
12MP camera with Optical image stabilization and Six-element lens

4.7-Inch (diagonal) widescreen LCD multi-touch display with IPS technology and Retina HD display
12MP camera with Optical image stabilization and Six-element lens
4K video recording at 24 fps, 30 fps, or 60 fps

4.7-inch Retina HD LED-backlit Display with IPS Technology, 1334 x 750 pixels with Fingerprint-resistant Oleophobic Coating & a IP67 Splash, Water & Dust Resistance Rating
iOS, Chipset: Apple A10 Fusion Chip, Processor: Quad-Core 2.34 GHz, GPU: PowerVR Series7XT (Six-Core Graphics)
12MP Camera with f/1.8, 28mm lens, 1/3 inch Sensor Size & 7MP Front Camera with f/2.2 aperture

New 7MP front-facing camera
Advanced solid-state home button for better responsiveness
12MP iSight back camera takes 4K Video

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, replacement of any defective parts, and a thorough cleaning process. Packaging and accessories may be generic. All products on Amazon Renewed come with a minimum 90-day supplier-backed warranty.
New 12MP camera, optical image stabilization, Quad-LED true Tone Flash, and live Photos LTE Advanced up to 450 Mbps and 802. 11a/b/G/openings/AC Wi-Fi with MIMO iOS 10 and iCloud
An entirely new camera system. The brightest, most colorful iPhone display ever. The fastest performance and best battery life in an iPhone. Every bit as powerful as it looks.

This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer.
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).
Unit will come in generic packaging box with certified lightning cable. Wall charger may not be included.