Below is a video showing how Samsung tests the Samsung Galaxy Fold phone using a robot. The test involves folding and unfolding the phone several times to ensure that it works as designed.
Basically, the Samsung Galaxy phone is built to withstand at least 200000 folds and unfolds. That is opening and closing it over 200 thousand times. If a user were to unfold and fold the Samsung Galaxy folding phone for an average of 100 times a day, this will translate to 3000 times month. Ideally, the Galaxy fold phone and its folding functionality should, therefore, give a service for at least 66 months or over five years.