kdeconnect was not sending SMS messages for me.
I just managed to get kde connect 25.12.3 installed on xubuntu 24.04.2!

With:

```
echo "deb http://archive.neon.kde.org/user noble main" | sudo tee /etc/apt/sources.list.d/kdeneon.list
wget -qO - https://archive.neon.kde.org/public.key | sudo apt-key add -
sudo apt update
sudo apt install kdeconnect
sudo apt --fix-broken install
```

I then, for good measure, followed up with:
```
sudo apt autoremove
sudo apt update
```

The 23.08.5 that's packaged with xubuntu is meh..