Whats app is a social media application own now by Facebook.  a very interesting way to hack WhatsApp is using the call forwarding feature on the victims Phone. Just dial this number from the victim’s phone, and then you can hack his/her WhatsApp account.

 From your victim mobile number dial  *21*your mobile number# in order to forward all the call he or she refusing to pickup or couldn’t pick up to your phone number.  For this trick to work Make sure your victim is not using his/her phone or within his or her reach.
Tip: Do it when your victim is sleeping I mean at midnight. you can try call the victim if he or she doesn’t answer now its time to carry out the attack 

Launch WhatsApp in your phone(whatsapp data must be flashed or cleared) enter victim mobile number as you are registering for whats app on a new phone after installing the application. Wait for about  30 seconds and then click on call me instead text messages. You will get called on your mobile number when successfully the victim couldn’t answer the call on his or her phone  because you forward call in the first step.

Now Just Listen to WhatsApp code carefully enter the code.
You hacked victim’s WhatsApp successfully. But you can do more.
Apply step 2 verification so the victim does not get his WhatsApp account easily.

To stop call forwarding dial #21#  on the victims phone to stop the call forwarding