As it reportedly gets to work on the iPhone Duo 2, Apple is emailing some iPhone Duo buyers to gather feedback on the first-generation foldable iPhones. The survey asks why customers bought the phone, how they rate its display, crease, and under-display camera, and what they would change.

Among the survey's questions are ones about whether the 5.4-inch outer display feels like the right size when the phone is closed and how visible the crease is on the folding inner display. It also asks whether the under-display FaceTime camera is too visible or distracting and how satisfied owners are with the camera's image quality. At the end, customers can add comments about "one thing, if anything, [they] would add to or change about" the iPhone Duo.