There's a fullscreen compact device coming from Samsung in the near future, with the chance, albeit a slim one, that it will be the S9 Mini. The last Samsung flagship to have a mini version was the S5, so we're keen on seeing how this one goes.
https://www.notebookcheck.net/There-s-a-full-screen-Samsung-compact-phone-on-the-cards-and-it-may-just-be-the-S9-Mini.263542.0.html