Download WhatsApp from the App Store or Google Play Store
Open WhatsApp
Tap Agree and Continue
Enter your phone number
Verify your phone number with the code sent by SMS or call
Allow access to contacts, photos, and notifications if desired
Enter your name
Add a profile photo if you want
Set your privacy preferences in Settings
Start a new chat or import contacts automatically
Enable chat backup in Settings if needed
Turn on two-step verification for extra security