It's hard to come across smartphones that feature physical built-in keyboards these days. However, the DIY hardware community has kept the concept alive. One of the latest projects is called Fairberry, and it aims to let you attach a proper BlackBerry keyboard to any modern phone.https://www.notebookcheck.net/DIY-Fairberry-keyboard-converts-any-modern-phone-into-a-BlackBerry.818282.0.html
Very cool. Such a shame we have to do it ourselves. I'd love a phone with sliding physical keyboard from one of the big manufacturers.