Im a beta user of whats app. I will get 5 times a week to update whats app. Whats app is a good platform where without any interruption of ads, network and other non sense things. Talking about network, whats app is the only one which still works fine in 2g network.
A good developer needs good times of appreciation all the time.
Now, about the call quality its not worst all the time because it depends on the speed of internet where I use 50mbps of speed of internet I can talk to any one without any voice brake. Its like im calling the other person in normal 2g call.
However, 2g calls are over and 4g calls came up with JIO where we are going a head in the digital world of revolution.
The lastest update on whats app was video calling feature and doodle and scribble. Invite others friends for their groups and such others are too updated.
Instead of using other non sense apps I recommend you guys always stick to WHATS APP.