Don't know sounds questionable

 

Because you have led then 10 posts in 4 years and generally people who are asking for calls are scams (not saying you are)

 

Someone that has been signed up for more then 5 years is less likely to be a scammer then someone who signed up a week ago.
OP, I unfortunately won't help you, international calling and I like to keep atleast me phone number private cause of reasons and what not.
Good luck on enabling whatsapp calling tho.

 

Do you have root?

Try this:
su
am start -n com.whatsapp/com.whatsapp.HomeActivity

 

title aside o.O can i really make free calls with whatsapp

 

yes but the feature isnt active as long nobody calls you with it. and a lot of people i know use whatsapp but nobody was invited to whatsapp calls now

 

So it's an invite-only system at the moment?

 

It's like facebook, it sucks hard but because everyone else uses it you are basically forced to use it as well.
I have tried to make my android using friends to default hangout as text message app so I could easily reply from computer and it would automatically use it for free instead of charging SMS. However last time I checked it was only possible to do video calls, not regular ones. WhatsApp seems to have browser version, but it works by connecting to phone and sometimes simply drops the connection without any reason or may take up to minute from receiving message to show up on computer.

This is the reason why my phone is always running Facebook Messenger, WhatsApp, Skype, Steam, Playstation App and Hangouts, also when needed Teamspeak and IRC. Even with all of those I still get regular text messages and phone calls. Luckily even the skype doesn't drain battery nowdays and nexus battery life is amazing.
That WeChat does look really good, but again, haven't heard about that one before so changes are nobody I know uses that.