Apple's iPhone Duo silicone case needs adhesive

Accessories often reveal more about a product's design than its spec sheet does. A report from early iPhone Duo users suggests Apple's official $79 silicone case requires the adhesive on the inside to be exposed before it can be applied. The $129 folio case is the other official option in the lineup.

For buyers, this is a reminder to check how protective accessories actually fit and install, especially on a foldable where the hinge and screen need careful handling. For the broader industry, it shows how even well-established accessory programs can run into practical friction as new form factors arrive.

For product teams and accessory makers, the lesson is clear: real-world testing of protective cases on new designs matters as much as the hardware itself.