I bought the S25 ultra unlocked from Samsung. My carrier is T-Mobile in the USA.I realized today that I don't have video call. I don't even have the icon on my dialer screen.I was in the T-Mobile store and was looking at the store model and it has it.I can use Google meet as a work around.The only other way to get it back would be to find the T-Mobile call APK.Verizon user with the unlocked version are having the same issue.