While refurbished phones have often been used, the term "used" has a more specific meaning. A used phone is sold as-is. It has not been tested or fixed, and it does not come with a guarantee. It is of much lower value than a refurbished phone, because no value has been added back into it. A refurbished phone is different in that it has been tested, repaired if necessary, and it has been cleaned. A refurbished phone should function exactly like it did when it was new, and it should come with a warranty just like a new phone.