OH! A software beta tester. If I remember correctly the only way to get into that is if Samsung puts the sign up sheet out or I think there is a setting in your phone you have to turn on. I could swear I remember something about a setting on the to test out any new software or features for Samsung had some sort of setting on the phone. I could be wrong though. I'm not sure which one is correct but I will see what If I can find out as well to confirm for you.
It will show up as a banner in this app. The Samsung Members app. I've done a few. You can find more information and directions for signing up here: https://developer.samsung.com/one-ui-beta
This should address if you have any issues with downloading the beta, and why.
Note due to the high volume in regards to beta stuff, The moderators may have archived your thread to this one. Please make sure to like my post if it helped you, and if you have any additional questions outside of what I've provided you'll need to reach out to a moderator directly.
