Log in to the application with your Samsung Account, and select the “Registration for One UI Beta Program” in the home banner or notices page to register. Note: The banner will appear when One UI 4.0 Beta is available in your region. This is what they said about the beta program but, sorry to interfer but it will be more enjoyable if you are with the official roll out because you might encounter some bugs from you're phone it's still you're choice, oh shoot! Forgot so maybe nope it's not available in A series still not sure about because they are still didn't release the beta. But still wait for the anouncement.
Hi! I'm Sam, your friendly Samsung Customer Service guy. Welcome to Samsung Members Community! Explore your new hub for all things Samsung and beyond. Earn the coolest badges and enjoy awesome perks from us by connecting with Samsung experts, super-fans, and other Community members for tips on features and how to get the most out of your Samsung product. Should you need technical assistance, don't hesitate to reach us via our TOLL-FREE mobile number #GALAXY (#425299) or via our TOLL-FREE LANDLINE: PLDT Toll free : 1-800-10-726-7864 Globe Toll Free : 1-800-8-726-7864 Standard Landline : (02)8-422-2111 Daily (8:00 AM to 8:00 PM) or via LIVE CHAT SUPPORT: https://livechat.support.samsung.com/Customer_new/PH
Have you tried what your co-members suggested? Hope to have helped you out. Be sure to click " ✓ Accept as Solution" when you find an answer that works for you. Stay safe and have a nice day ahead!