Friends, now a days everyone use one or another app to make video call. This call requires internet(wi fi or data pack). Suppose you don't have both, like in travel, in some basements. You usually do not consider to make use of 📞 icon available on screen and consider this is for voice call or non video call. If you believe so you are incorrect, a video call option is available. Things are very simple but because of our habit to use other app for video call just keep it out of mind that both audio as well video call can be done on basuc mobile network, NO REQUIREMENT OF INTERNET.
