All smartphones are similar to each other nowadays. It’s just a screen with several buttons on the edge. Most of the time it’s OK, but some tasks require typing a lot of text, so an on-screen keyboard is not the best solution. Several years ago, it was possible to buy a slider keyboard case for popular smartphones, so most of the time you use your smartphone as usual, but when you want to type a long email or execute several command over SSH you just slide a physical keyboard and use your device like a PDA. It’s a bit strange that there is no such an option nowadays. Of course, it’s possible to buy a Cosmo communicator or PinePhone Pro with a keyboard, but these devices are for hardcore enthusiasts and it can be difficult to use them every day.