The fastest way to add someone

Open WhatsApp and tap the Chats tab at the bottom. Look for the icon that looks like a speech bubble with a plus sign — on iPhone it's in the top right corner, on Android it's usually in the bottom right. Tap it, then select New Chat. WhatsApp will show you a list of people already in your phone's contacts. Find the person you want to message and tap their name.

If the person is not in your phone's contacts yet, you'll need to add them to your phone first before WhatsApp can find them. Go to your phone's Contacts app, create a new contact with their name and phone number, then return to WhatsApp and try again. WhatsApp reads from your phone's contact list — it doesn't create its own separate address book.

Once you tap their name, a chat window opens and you can start typing. WhatsApp automatically detects that this person has WhatsApp installed and will send the message through WhatsApp rather than as a text message.

Key Takeaways

  • You must add someone to your phone's contacts before you can message them on WhatsApp — the app pulls from your existing contact list.
  • The plus-sign icon in the Chats tab is the quickest way to start a new conversation with someone already in your contacts.
  • WhatsApp automatically detects whether someone has the app installed and routes your message accordingly.
  • If you want to message someone whose number you don't have, you can ask them for it through another method first, add it to your phone, then find them in WhatsApp.

Adding someone by their phone number directly

If you know someone's phone number but they're not saved in your phone yet, you can add them to WhatsApp without saving them to your contacts first. Tap the three-dot menu (on Android) or the Settings tab (on iPhone), then look for Contacts or New Chat. Some versions of WhatsApp show an option to Add Contact or Invite to WhatsApp.

Type or paste the phone number in the format it would appear in your country — usually with the country code at the start. For example, a US number would be +1 followed by the area code and number. WhatsApp will check whether that number has an account. If it does, you can open a chat with them when ready. If it doesn't, WhatsApp offers to send them an invitation link via text message or another app.

What happens when you add someone who doesn't have WhatsApp

If you try to add someone and WhatsApp detects they don't have the app, you have two options. You can send them an invitation link through text message, email, or another messaging app. They can click the link, which takes them to WhatsApp's read page. Once they install the app and create an account with that same phone number, you'll be able to message them on WhatsApp.

Until they install WhatsApp, messages you send will go through your phone's regular text messaging service instead, and you'll be charged according to your phone plan. WhatsApp doesn't send messages to people who don't have accounts — it only works between people who both have the app installed.

Managing your contact list in WhatsApp

WhatsApp doesn't let you edit or delete contacts within the app itself. Any changes you make to a contact's name, phone number, or other details must be made in your phone's Contacts app first. Once you update them there, the change appears in WhatsApp automatically the next time you open the app.

If you want to hide a contact from your WhatsApp chat list without deleting them from your phone, you can archive the conversation. Swipe left on the chat (iPhone) or long-press it (Android), then select Archive. The conversation disappears from your main chat list but stays in your phone, and you can search for it later if you need it.

Adding contacts from a group chat

When you're in a WhatsApp group, you can see all the members' names and profile pictures. If you want to message one of them individually, tap their name in the group member list. WhatsApp opens a direct chat with them. If you want to save their contact information to your phone, tap their name again to open their profile, then select Add Contact or the plus-sign icon. This creates a new contact in your phone's contact list with their WhatsApp information.

Be aware that adding someone from a group doesn't notify them — they won't know you've saved their number unless you message them. If you want to message someone from a group privately, you can do so without adding them to your contacts first.

Privacy and what others can see when you add them

When you add someone to WhatsApp, they are not notified that you've done so. They won't receive a message or alert saying you've added their number. However, once you send them a message, they'll see it and know you have their contact information.

Your profile picture, status, and "last seen" information are visible to anyone who has your number saved in their phone, unless you change your privacy settings. If you want to limit who can see these details, open WhatsApp Settings, tap Privacy, and adjust who can see your profile picture, status, and last seen time. You can choose between Everyone, My Contacts, or Nobody.

Frequently Asked Questions

Can I add someone to WhatsApp if I don't have their number saved in my phone?

Yes. If you know their phone number, you can type it directly into WhatsApp's new chat screen. WhatsApp will check if they have an account. If they do, you can message them without saving their contact to your phone first.

What if someone I added to WhatsApp changes their phone number?

If they change their number and create a new WhatsApp account with it, you'll need to add the new number to message them. Their old chat history with you will stay in your app, but it won't be connected to their new account. You can update their contact in your phone's Contacts app and then search for them again in WhatsApp.

Can I add multiple people to a conversation at once?

No, not through the add contact method. To message multiple people at once, you create a group chat instead. Tap the plus-sign icon, select New Group, and choose all the people you want to include. Everyone in the group sees all messages and can reply to the whole group.

Will someone know I added them to WhatsApp?

No. Adding someone is invisible to them. They only know you have their number when you send them a message. If you want to contact them first through another method to let them know you're adding them, that's up to you.