Been doing beta for years - probably announced within 2 weeks. For those who haven't participated before - if you only have 1 phone, beta has bugs and sometimes it can be a pain with some things not working correctly like Bluetooth. Also, themes don't work correctly either. Read up & see if it's worth it for you.
Yep, the Beta always goes out to the S Series first then the Note series later. Beta for the S10 didn't have a lot of bugs but the S7, S8 and S9 were full of them so beware before downloading. Especially the first Beta. They usually do 4 stages and then release the stable version to Beta testers first. Hope that helps
the beta is only for South Korea right now but should roll out to more countries in the upcoming days and weeks. I did see a banner for the beta in Samsung pay but when I click on it nothing happens. my guess the US will be getting the beta soon is my guess