Use qq voice and call directly which cheap?
Depends on the network if the data you package the flow of the package, then QQ voice better
2014 version of the QQ voice call is the usual QQ voice session improvement, voice conversation flow how much, how much voice traffic flow, wifi case more cost-effective, their own fixed amount of traffic, with endless words, can also be outside use. Traffic costs slightly lower than the ordinary calls, but QQ voice calls with the same Internet phone calls intermittent phenomenon is more obvious.
QQ voice must be both through QQ online, with QQ voice calls are the flow of traffic
