If you have ALL YOU CAN EAT data on your phone contract, then, as others suggest, you can just stream Youtube videos
all day / night long ( Cover your phone screen though - DON’T be watching videos obviously! 
) there is tons of content where it’s sufficient enough to listen to just the audio track without the video ( use your imagination )
I like listening to old classic sitcoms like Steptoe and Son, Fawlty Towers, or stand up comedians, or if your geeky like me there is plenty of non fiction stuff TED Talks, etc ( ANY subject! ) History, Psychology, Philosophy, Languages, Computers or whatever floats your boat! 
Of course you can get all the audio stuff including sitcoms from the library ( Do libraries still exist? ) if you prefer!
Lastly, don’t forget the millions of free podcasts online… just search: {Your subject} + Free podcast and you’ll be overwhelmed
at what is available. Download a free podcast app to your phone first. I recommend ‘Podcast Addict’ ‘Stitcher’ or ‘Podbean’ I’ve used those and there all great!
Happy Listening!