One of the advantages of Windows 10 is the ability to bring the ecosystem to other devices, which can be very different as an Xbox One console for example and enjoy several desktop applications in both places, just as it happens with Play Anywhere video games.
One of those applications that is available on all Windows 10 devices is Groove Music, which also allows us to reproduce local content, hire the streaming music service. With this service, we can enjoy one month free trial when, of course, we subscribe for the first time, in the same way as with the rest of the competitor's services.
However, now you can get up to 3 more months thanks to Xbox Live Rewards, Although yes, the condition is that you do not have any pre-service subscription. The first thing to do is be enrolled in the program of Xbox Live Rewards, which grant rewards depending on the dynamics that Microsoft provides.
After this, you will have to register for the first time in Groove Music, where you will receive your trial month, but additionally you will receive a code to change it for an additional 3 months and so you can use the service.