WhatsApp Hijacking... One mistake, which will make your chats 

WhatsApp is the most widely used instant messaging platform, whatsapp

You have to use your mobile number to create an account on this , problem and solution

What if someone hijacks your WhatsApp with the help of this phone number and more

This has happened with many users and more

What does the user do with your contacts, chats and other details after the account is hijacked

It totally depends on your luck and phone

User can also misuse your data