Where did you buy your Note 20 Ultra? What's the exact model number of your Note? The AT&T Note 20 Ultra has this model number SM-N986UZNAATT. That's way too long to be on a phone call. Yikes!
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I got the download the moment I put my Sprint SIM card back in my unlocked Note 20 Ultra. Before that, I had my AT&T SIM card in my phone and I just wasn't getting the download. I waited days for that download, but the moment I put in my Sprint SIM card the beta download was there to be downloaded.
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I have the unlocked Note 20 Ultra, and the funny thing is that my phone started downloading the beta when I put my Sprint SIM card in my phone. After that, I put my AT&T SIM card back in my phone and now I have WiFi Calling.
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Try clearing data and cache on the Samsung Members app through Apps under your phone's Settings. Long press on Samsung Members app icon and tap on the letter "i" inside the circle. Or, long press on the Samsung Members app icon and tap on Error reports.
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Maybe you're not enrolled. Try this to see if it says "Withdraw." Tap on, "CLICK THIS LINK TO ENROLL IN BETA." https://forum.xda-developers.com/galaxy-note-20-ultra/how-to/announcement-beta-enrollment-android-11-t4185977/post83857495#post83857495
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I ran into that same thing. I got Samsung Members app to work correctly when I uninstalled and reinstalled it. Download Samsung Members app from the Galaxy Store app and not from Google play.
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Then it's probably due to the beta being closed. I'm also wondering if one has to be picked for the beta by Samsung in order for it to be supported.
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I waited nine days for the beta download. But, as soon as I put in my Sprint SIM card, the beta started downloading. Anyway, I'm really beginning to like AT&T more and more by the day. I'm getting speeds of 1,800 Mbps on AT&T's 5G+.
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The moment I put in an old Sprint SIM card my unlocked Note 20 Ultra got the download for the beta. I downloaded and installed the beta, then I popped my AT&T SIM card back in and I couldn't believe my eyes when I saw the WiFi calling setting.
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You have to be persistent in checking for the banner throughout the day. Check every 5 to 10 minutes. That banner comes, and then it quickly leaves.
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I just got the banner yesterday and I successfully registered for the beta, but now the banner is gone. You'll have to constantly and persistently keep checking for the banner throughout the day daily. That's what I did.
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