CNET found that the phone cracked on a first drop of three feet, aka pocket height. A second drop on the opposite side of the phone resulted in further damage.
"The iPhone X can probably handle your everyday wear and tear, but dropping it without a case is out of the question," the site concluded. "We learned it only takes one bad drop to break the glass on this phone. Even the stainless steel frame is susceptible to damage."
In a statement, Apple doubled down on its claim about the phone's durable glass and suggested protecting it with a case if you have concerns about damage:
"The new iPhone is designed to be durable, but not indestructible, and goes through rigorous real world testing. iPhone X is made from the most durable glass ever in a smartphone with a 50 percent deeper strengthening layer using our dual ion-exchange process, further reinforced by an internal laser welded, steel and copper structure. And the surgical-grade stainless steel band that wraps around and reinforces iPhone X is a special Apple-designed alloy that is both durable and more pure. If anyone is concerned about dropping their iPhone and damaging it, we suggest using one of the many beautiful cases available to protect iPhone."