1. NextCloud supports Calendar and Contacts sync if you are comfortable going down that route.
2. They're just bluetooth ear buds, they work with every phone that supports bluetooth.
2. They're just bluetooth ear buds, they work with every phone that supports bluetooth.
The question is where do you store the music since it's a dumb phone
Perhaps get one of these? They shouldn't cost more than £€$50 for a couple of GB