Do you keep using data when you listen to a song streaming on your phone?

pu1. It's not all the music I've heard, but I have a few songs I've heard recently on the app

2017-12-25

OK

pu2. The music I've been listening to recently is saved as a cache in the application and erased when I erase the cache. You don't know how long or how long the application will store it, so you shouldn't believe it's too cached

2017-12-25

OK