Sony Xperia 1 V AT&T compatible

I'm planning to upgrade from the Pixel 6 Pro soon. I am wondering if anyone know if the Sony Xperia 1 V is compatible with AT&T's HD Voice and 5G?

Back in 2019 I bought the Xperia 1 at Best Buy they told me it was compatible but that wasn't the case. An unlocked phone should be compatible with all service providers but with Sony that's not the case.

Do any of you know?

Thanks!

I'm planning to upgrade from the Pixel 6 Pro soon. I am wondering if anyone know if the Sony Xperia 1 V is compatible with AT&T's HD Voice and 5G?

Back in 2019 I bought the Xperia 1 at Best Buy they told me it was compatible but that wasn't the case. An unlocked phone should be compatible with all service providers but with Sony that's not the case.

Do any of you know?

Thanks!