WhatsApp Two-Factor Authentication Instructions
- Go into Settings
- Click on Account
- Click on Two-step Verification
- To enable, WhatsApp asks you to create a six-digit PIN to register your phone number with WhatsApp. You also need to provide an email address in case you need to do a reset. If you later sign out or log in with a different device, WhatsApp will text you a code, and you will need to re-enter the PIN.