I mean that when i speak , the other person cant speak this time (together).. He have to wait to finish what i say..
Hmm...we haven't heard this complaint before.
Does this happen to you both on 3G and on WiFi?
Also, what device do you have, and the other side of the conversation?
Some questions were asked here about the data -
Please note that Viber uses 0.3MB per minute of call, and usually less than 1KB per Viber text message.
Since Viber uses the internet to function, both sides of the conversation must be connected to either WiFi or 3G. If a user is connected to WiFi - that user is not paying anything for sure. If he's connected to 3G, the user *may* be paying his cellular company for the data (Viber uses 0.3MB per minute of call), but that depends on the specific data plan that he has with his cellular company, and needs to be verified with them.