The hinge mechanism is the most important part of a foldable phone, and it can be the first part to fail, as well as being the part that requires the highest degree of ingress protection, as small particles could damage the hinge. On a test by CNET, the Galaxy Fold's hinge only lasted for 120,000 folds (equivalent to 3 years of use) out of the advertised 200,000 folds (equivalent to 5 years of use).