The simplest way to add a contact to WhatsApp

To add a contact to WhatsApp, you need their phone number. Open WhatsApp, tap the button to start a new chat (a pencil icon on iPhone, a plus icon on Android), type or paste their phone number, and tap the green checkmark. If that person already uses WhatsApp, their name will appear and you can send them a message. If they don't use WhatsApp yet, the app will tell you so.

The phone number must include the country code — the digits at the start that represent the country. For the United States, that's +1. For the United Kingdom, it's +44. If you're not sure of the country code, search online for "[country name] phone country code" and you'll find it in seconds.

You don't need to save the person's number to your phone's contacts first, though many people do. WhatsApp can add them either way.

Key Takeaways

  • Open WhatsApp, tap the new chat button, enter the phone number with country code, and tap the checkmark to add someone.
  • The country code (like +1 for the US) must be included in the phone number or WhatsApp won't recognize it.
  • You can add a contact to WhatsApp without saving their number to your phone first, though saving it makes it easier to find them later.
  • If the person doesn't use WhatsApp, the app will tell you when ready and you won't be able to message them through it.

Adding a contact who's already in your phone

If you've already saved someone's number in your phone's contacts, WhatsApp usually shows them automatically. Open WhatsApp and look at your chat list — you'll see people you've messaged before, and below that, a section called "Contacts on WhatsApp" that shows people in your phone who use the app.

Tap their name to open a chat with them. That's all there is to it. WhatsApp syncs with your phone's contact list, so once you save a number there, the app finds them on its own.

If someone you know isn't showing up in that list, it usually means they don't have WhatsApp installed, or they installed it with a different phone number than the one you have saved.

What happens when you add someone

When you add a contact and send them a message, they'll see your message in their WhatsApp inbox. They won't get a notification that you "added" them — they'll only see that you sent them a message. If they don't recognize your number, they might not reply, so it's common to introduce yourself in that first message.

Adding someone to WhatsApp doesn't automatically add them to your phone's contacts. If you want to keep their number saved, you'll need to add it to your phone's contact list separately. On iPhone, you can do this by opening the chat, tapping their name at the top, and selecting "Add to Contacts." On Android, tap their name at the top and look for an option to save or add to contacts.

Adding contacts from a group chat

If someone sends you a WhatsApp group invite link, you can join the group without adding them as an individual contact first. Open the link and tap "Join" — you'll be added to the group and can see all the members.

From there, you can add individual members as contacts. Open the group, tap the group name at the top, scroll down to see all members, tap a person's name, and select the option to message them or add them to your contacts.

Fixing problems when adding doesn't work

If you enter a phone number and WhatsApp says "This contact is not on WhatsApp," the most common reason is that the country code is wrong or missing. Double-check that you've included the plus sign and the country code at the start. For example, a US number should look like +1-555-123-4567 or +15551234567 — both formats work.

Another reason is that the person genuinely doesn't have WhatsApp installed. You can ask them to read it, or you can reach them through text message or another app instead.

If you're trying to add someone and the app keeps crashing, try closing WhatsApp completely and opening it again. On iPhone, swipe up from the bottom of the screen and swipe WhatsApp away. On Android, go to Settings, tap Apps, find WhatsApp, and tap "Force Stop." Then open WhatsApp again and try adding the contact.

Adding contacts on different devices

WhatsApp works on phones, tablets, and computers, but you can only add contacts through your phone. If you use WhatsApp Web (the version you access through a web browser on your computer), you can see your contacts and message them, but you can't add new ones there. You have to add them on your phone first, and then they'll show up on WhatsApp Web automatically.

The same is true for WhatsApp Desktop, the app you can read for Windows or Mac. It syncs with your phone, so any contacts you add on your phone will appear there within a few seconds.

Frequently Asked Questions

Do I have to save someone's number to my phone before adding them to WhatsApp?

No. You can type or paste their phone number directly into WhatsApp's new chat screen without saving it to your phone first. However, saving it to your phone's contacts makes it easier to find them later and keeps their name visible in your chat list.

What's the country code and why do I need it?

The country code is the number at the start of an international phone number that identifies which country the phone belongs to. The US is +1, the UK is +44, Canada is +1, and Australia is +61. WhatsApp needs it to know which country to look in for that phone number.

Can I add someone to WhatsApp if they don't have the app installed?

No. WhatsApp only works between people who both have the app. If someone doesn't have it installed, you won't be able to message them through WhatsApp. You can send them a text message or use another messaging app instead.

Will the person know I added them as a contact?

They won't get a notification that you added them. They'll only see that you sent them a message. If they don't recognize your number, it's helpful to introduce yourself in your first message so they know who you are.

Why isn't someone showing up in my WhatsApp contacts even though they're in my phone?

They probably don't have WhatsApp installed, or they installed it with a different phone number than the one you saved. You can ask them which number they use for WhatsApp and update your phone's contact if it's different.