When Apple announced the iPhone Duo , it conveniently left out one piece of information that every other major foldable phone maker usually discloses: how many folds the iPhone Duo can handle. Now we know thanks to real-life testing from owners.

YouTuber Kuba Klawiter had an iPhone Duo folded and unfolded by hand on a live stream until its screen cracked. On fold 75,001, a line formed down the middle of the inner screen.

For those keeping track, Samsung officially rates its latest Galaxy Z Flip and Z Fold devices for 500,000 folds before the screen should break. That’s more than double the 200,000 folds its foldable phones were previously rated for.

Other reviewers have also put the iPhone Duo’s folding durability to the test. Independent tech journalist Joanna Stern had a robot made to fold her iPhone Duo, and it lasted over 32,000 folds , though she didn’t keep going until it broke.

Tech YouTuber Tim Pan of MediaStorm also repeatedly folded the iPhone Duo.…