Has anyone had success in signing up for OneUI 4 beta on the Galaxy Flip 3? I have messaged Samsung about it and get a half *** response saying you can only enroll in the app, well the option isn't there. Then I'm told it's not released on the United States which is some bull because tech sites and YouTube videos show you how to enroll and download on US devices but because I don't have a **bleep**g banner I'm stuck. Samsung needs to get its beta programs up to par with other manufactures when Apple and Google have open beta programs and enrolling online by tapping a button and or downloading a profile. Samsung makes it impossible. This has also happened with any major update on Samsung devices where you have to sign up from Samsung members. Android 9 and 10 on my S8 and S9 models and now this.
If you're not seeing the banner, then either there are no available slots, or your device isn't eligible. Betas are only for unlocked devices and those on T-Mobile. The beta has a limited number of slots, it is on a first come, first serve basis.