Zenfone 8 appears on AT&T 3G sunset list of approved devices but does not support voice

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Brand New Zenfone 8 purchased from Amazon in the US, no rooting or mods and latest Android 12 update applied. The phone appears on AT&It's approved list at att.com/3gsunset, but the phone will not make or receive voice calls. AT&T 611 says that VoLTE support is required, and that I need to buy a new phone. I otherwise like the Zenfone 8. Should I return it or will Asus work this out with AT&T?
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Wrong forum. This is for ROG Phone 2.
Thanks @Volodesi
I created a separate post under the Zenfone 8 forum.
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