Can I use it? Yes! Plasma Mobile is currently preinstalled on the PinePhone using Manjaro ARM. There are also various other distributions for the PinePhone with Plasma Mobile available. There is also postmarketOS, an Alpine Linux-based distribution with support for many more devices and it offers Plasma Mobile as an available interface for the devices it supports. Read More
Frameworks Plasma Mobile is built on top of KDE Frameworks. You can find download links for the stable releases of these on download.kde.org and its API documentation here. Plasma and Plasma Phone Component Plasma provides components for multi-device workspaces. Read More
We have multiple tutorials regarding how to develop an Plasma Mobile application, how to debug the telephony features and more at develop.kde.org/docs/plasma-mobile.