When Apple announced the iPhone 8 and 8 Plus, it moved away from using metal for the back of its phones in favor of all-glass construction. The company promised that this would have no impact on device strength, claiming its metal backs were more resilient than ever. Multiple reviewers reported the phone scratched just from being tucked into a pocket. Scratch resistance and impact resistance aren’t the same thing, though scratches can make a device more likely to break depending on their severity. Now, there’s additional evidence the iPhone 8 and 8 Plus may not be as strong as what Apple claimed.