I have a fascia on a vintage smartphone that's separated. It used to be attached by the sort of glue that keeps the screen glass attached to the frame on a modern phone, but I've only seen this type ...

Borrowing a page from the Japanese paper-cutting art of kirigami, researchers have made tape that is 10 times as sticky as uncut tape but is also easy to pull free and then reuse (ACS Appl. Mater.