https://wccftech.com/samsung-will-find-out-if-you-are-being-careless-with-your-galaxy-z-flip-3/

Foldable phones are fragile, and we are all aware of that. However, Samsung has gone the extra mile and has taken extra precautions against false warranty claims since they are still a thing. As it turns out, the Galaxy Z Flip 3 is logging all acceleration-based free-fall events. Samsung engineers can look into these logs when a customer wants to file a claim. This data can help the engineers determine if the damage should be or should not be covered in the warranty.

Using these logs that record free falls based on data from the accelerometer, Samsung engineers will be able to determine if your Galaxy Z Flip 3 was dropped from distances higher than 1 meter. If that was the case, Samsung could refuse free repairs even if the phone is still under warranty.