We at Techworm bring you two latest ways to enable WhatsApp calling without an invite.
One works with rooted Android smartphone and for the other to work you need a non-rooted smartphones.
Also for this method you do not have to root your Android smartphone to initiate the feature.
You should now be having calling feature enabled on your WhatsApp.
Step 2 : Inside ES FileExplorer, navigate to the following path.
Open com.whatsapp_preferences.xml file using the ES File Explorer File Manager app.
Step 3 : Tap on the menu button and select Edit.
Just add the following lines before the tag.
all
Step 5 : stash your changes.
To save, you’re free to tap on back button and the save window will appear automatically.
Step 6 Final Step : Open WhatsApp App.
)com beware its a scam
Read More
source: www.techworm.net