A refurbished phone is a used phone that has been tested, repaired if needed, and restored to full working order

A certified refurbished phone is a pre-owned phone that has been professionally tested, repaired, and restored to a set standard,

A blacklisted iPhone is one that carriers have blocked from connecting to mobile networks. It still turns on and runs

A certified refurbished phone is a pre-owned phone that has been professionally tested, repaired, and restored to a set standard,