For understandable reasons, the first generation returned to Touch ID.

Sam Rutherford for Engadget

You might have a hard time trying to get hold of one yourself for the foreseeable future , but the iPhone Duo has been in the hands of reviewers for a little while now. And while it is clearly a first-generation product, overall impressions of Apple's first foldable have been broadly very positive.

One potential annoyance for anyone coming from another modern iPhone, however, is the lack of Face ID, with Apple instead opting to go back to Touch ID for the first time since 2022's iPhone SE. Most iPhone users will have been using Face ID since the iPhone X.…