Surely many of you was already have noticed, and that is if we try to activate the voice calls on WhatsApp to another users is impossible, and is that like in previous activations the company has decided to close the activations of the calls. Apparently the number of users with the possibility to make calls is limited, increasing it each time that open the activations to test how the servers behave.
And is that WhatsApp is proving to go step by step, without wanting to saturate their servers and leave with no service to all users, for which reason, is increasing the numbers of call users gradually. Can you imagine what might have happened if they activate the voice calls in more than 700 million active users at once?. Everybody would have wanted to try how the calls works since the first minute but surely would have left the application KO.
Now we have to wait to be allowed to re-enable Voice Calls on WhatsApp other users or wait that reach to all users with a update without the need to receiving a call to active the service, which is more than likely in the upcoming days.