A:AnswerCheck your volume output. Are you using a sound bar? You may need to just unplug and plug back in to reset it. Check your cable connection if you use a cable box.
A:AnswerThe TV comes with a lot - Netflix, Prime, Samsung Plus, Samsung Health, YouTube, Apple TV, Disney+. I can't remember if I downloaded Hulu & HBO Max or if they were already there, either way you can download them from the Samsung store. There's also the Samsung internet browser.
Other apps I've been able to download - YouTube TV, Spotify, Sirius XM, and Emby. A big thing I don't like, however, is the inability to remove apps; I don't use Apple TV or the browser, but you can't completely uninstall them. You can hide them by putting whatever your most used apps on the homescreen, but I'm always worried about storage build up, which was the issue I had with my previous TV.