I wonder why such an important piece of information is not provided anymore in the device plugin? What was the reason to remove the property?
The name of the device, especially when users can authorise/revoke API access to apps on different devices, is an important variable to know. There is a plugin that brings back this functionality for Android, iOS and for Windows it would be a one-liner only too. https://github.com/becvert/cordova-plugin-device-name