Why is my Galaxy S5 not able to do video calling?

[AC Question]

I have activated my HD voice and video calling feature but I can video call anyone. Am I missing something or have I done all that needs to be done?

 

[ManiacJoe]

Which carrier?
Which video call app?
What is the exact wording of the error message you are getting?

 

[Rukbat]

Video calling isn't a function of the telephone system, it's a function of the carrier and the phone. If you call someone who doesn't have video calling, you get a voice call.

 

[B. Diddy]

Welcome to Android Central! If you didn't get your phone from your current carrier, that might also prevent you from taking advantage of your carrier's video calling feature.