If you are asked or sent a Facebook request to install the "WhatsaApp Calls" application, please do not. This application has nothing to do with "WhatsApp" and there is no "WhatsaApp Calls" messaging application or service. This application is a scam designed to send spam to your Facebook friends, by sending them invitations to itself and taking them to online advertisements.
The Fake WhatsApp Application or Service: ‘WhatsaApp Call’

What the scammers have done is to create a fake Facebook application called ‘WhatsaApp Call’.
Note:
- they have placed an “a” between “Whats” and “App”, which makes it ‘WhatsaApp’
- the legitimate name is ‘WhatsApp’ and not ‘WhatsaApp’
The legitimate WhatsApp Facebook page is located at the following address:
https://www.facebook.com/ whatsapp.official
Always go to the legitimate WhatsApp Facebook page and verify any WhatsApp information, application or service before granting access to your account, sharing, liking, commenting on any Facebook post, which claims that they are associated with WhatsApp.
If you click on the invitation, you will be asked to grant or give this fake application access to your Facebook application.
Once you have given it access, it will then ask you to send the request to all of your Facebook friends, in order for you to use the service. But, this is a trick used by the scammers who have created this fake application, to send it to other Facebook users.
If you were tricked into installing this fake WhatsApp application, please click the link below for instructions on how to remove a Facebook application, and remove all Facebook applications with the name: WhatsaApp Call.
Click here for instruction on how to remove the fake WhatsApp application - WhatsaApp.
Also, if you have received an invitation try this bogus service (WhatsaApp Call), please report it to Facebook and then delete it.
This fake Facebook application is located on Facebook at the following address (remove spaces in URL):
https://apps.facebook.com/ 383570135117233/ ?fb_source=notification &request_ids=1442938145948275
This scam is related to the following: