How to Join WhatsApp: Setup in 5 Minutes

What You’ll Need

A smartphone (iPhone or Android) or a computer for WhatsApp Web/Desktop
A working phone number that can receive SMS or phone calls for verification
An internet connection (Wi-Fi or mobile data)
The WhatsApp app from your device’s official app store (App Store for iPhone, Google Play for Android)

Step-by-Step

Download WhatsApp – Open the App Store (iPhone) or Google Play Store (Android) on your phone. Search for “WhatsApp Messenger” and tap Install. On a computer, go to the official WhatsApp website and download the desktop app for Windows or macOS.
Open the app and accept terms – Tap the WhatsApp icon to open it. Read the Terms of Service and Privacy Policy, then tap “Agree & Continue” (or similar, wording may differ slightly by version).
Enter your phone number – Select your country from the drop-down list, then type your mobile number. Double-check the number – you’ll need access to it for verification. Tap “Next” or the arrow button.
Verify your number – WhatsApp will send a 6-digit code via SMS to your phone. If it doesn’t arrive automatically, tap “Resend SMS” or choose “Call me” to receive the code by voice call. Enter the code in the app.
Set up your profile – After verification, enter your name (this is what contacts will see). Optionally, add a profile photo by tapping the camera icon and choosing a photo from your gallery or taking a new one. Tap “Next” or “Done”.
Start using WhatsApp – You’re in! Allow notifications if prompted, and optionally sync your contacts. You can now start chats, create groups, or make calls. To use on a computer later, open web.whatsapp.com on your PC and scan the QR code with your phone’s WhatsApp > Settings > Linked Devices.

Common Mistakes

Entering the wrong phone number – A typo in your number means you won’t receive the verification code. Always double-check the country code and full number.
Using a landline or VoIP number – WhatsApp requires a mobile number that can receive SMS or calls. Some landlines and VoIP services won’t work.
Deleting the app during verification – If you close or delete the app before entering the code, you may have to restart the process. Keep the app open until you’re fully set up.
Skipping the profile photo – Not adding a photo is fine, but your contacts will see a blank avatar. You can add one later in Settings.
Ignoring the backup prompt – When you first open WhatsApp, it may ask if you want to restore a backup. If you’re a new user, choose “Skip” – restoring an old backup could overwrite your new account.

Tips

Use a number you’ll keep – Your WhatsApp account is tied to your phone number. Changing numbers later requires transferring your account, which is possible but more work.
Set a profile photo that’s recognizable – A clear photo of your face or a distinct image helps friends find you.
Turn on two-step verification – For extra security, go to Settings > Account > Two-step verification and create a 6-digit PIN. This prevents others from activating your number on another device.
Control your privacy – In Settings > Privacy, you can choose who sees your last seen, profile photo, and online status. Set these to “My Contacts” if you prefer.
Link a companion device – You can use WhatsApp on up to 4 linked devices (like a tablet or computer) without keeping your phone online. Go to Settings > Linked Devices > Link a Device.

Troubleshooting

I didn’t receive the verification code – Wait a minute, then tap “Resend SMS”. If that fails, choose “Call me” to get the code via automated voice call. Make sure your phone has signal and can receive calls. If you’re using Wi-Fi, try switching to mobile data or vice versa.
I got a message that my number is already registered – This means the number is already linked to an existing WhatsApp account. If it’s yours, you can log back in by entering the number and following the verification steps. If it’s not yours, you may need to wait for the previous owner to deactivate their account, or contact WhatsApp support.
The app says “This account is not allowed to use WhatsApp” – This usually means you’re using an unsupported device or a modified version of the app. Uninstall any unofficial WhatsApp versions and download the official one from the app store.
Verification code is wrong – Make sure you enter the 6-digit code exactly as received, without spaces. If it’s expired, request a new one. Sometimes the code is sent to a linked device – check all your devices.
App freezes during setup – Close the app completely and reopen it. If that doesn’t work, restart your phone. If the problem persists, uninstall and reinstall the app (your account will still be active once you verify again).
I can’t link to WhatsApp Web – Make sure your phone has an internet connection and the WhatsApp app is open. On the computer, go to web.whatsapp.com and scan the QR code with your phone’s camera. If the QR code doesn’t scan, refresh the page and try again.

Frequently Asked Questions

Is WhatsApp free to join?

Yes, WhatsApp is free to download and use. It uses your internet connection (Wi-Fi or mobile data) to send messages and make calls, so there are no per-message charges. However, standard data charges from your mobile carrier may apply if you’re not on Wi-Fi.

Can I have two WhatsApp accounts on one phone?

Officially, WhatsApp supports only one account per phone number. However, some phones with dual SIM support allow you to use two WhatsApp accounts by installing a second instance (e.g., via the phone’s built-in dual app feature). This is not available on all devices.

Do I need a smartphone to use WhatsApp?

Yes, you need a smartphone (iPhone or Android) to initially set up an account. After setup, you can use WhatsApp on a computer or tablet via linked devices, but the phone is required for the initial verification.

Can I use WhatsApp without giving my phone number?

No, WhatsApp requires a valid phone number to create an account. Your number is used for verification and is visible to your contacts (though you can hide it from strangers in privacy settings).

What happens if I lose my phone after setting up WhatsApp?

Your account remains active. You can reinstall WhatsApp on a new phone, enter the same number, and verify it with a code sent via SMS or call. If you have two-step verification enabled, you’ll also need your PIN.

Can I change my phone number later?

Yes. In WhatsApp, go to Settings > Account > Change Number. This will transfer your account, chats, and groups to the new number. You’ll need to verify the new number with a code.

Sources: WhatsApp Help Center. Menus and buttons can differ slightly by version. Spotted something out of date? Tell us.