Adding someone to WhatsApp starts with saving their phone number to your device, then inviting them to a group or starting a direct chat

WhatsApp does not have a built-in directory or search function to find people by name alone. You need their actual phone number, and that number must be saved in your phone's contacts first. Once you have their number saved, you can add them to a group chat, start a one-on-one conversation, or invite them to join an existing group you manage.

The process differs slightly depending on whether you want to add someone to a group or create a direct message with them. Both take less than a minute once you have their number.

Key Takeaways

  • You must save a person's phone number to your device contacts before you can add them on WhatsApp.
  • To add someone to an existing group, open the group, tap the group name at the top, scroll to Members, and tap the plus icon to invite them.
  • To start a direct chat with someone new, open WhatsApp, tap the message icon, and enter their saved contact name or phone number.
  • When you add someone to a group, they can see all messages sent after they join, but not the conversation history from before.
  • You can only add people to a group if you are the group creator or if the group settings allow members to add others.

Save the person's phone number to your contacts first

Open your phone's Contacts app (not WhatsApp). Tap the plus icon or "Add Contact" button. Enter the person's name and their full phone number, including the country code if they are outside your country. For example, a US number looks like +1 555 123 4567. A UK number looks like +44 20 7946 0958. Save the contact.

WhatsApp reads from your phone's contact list, so the person must exist there before WhatsApp will recognize them. If you try to add someone whose number is not saved to your contacts, WhatsApp will not show them as an option.

Add someone to an existing group you manage

Open WhatsApp and find the group chat. Tap the group name at the very top of the screen. This opens the group details page. Scroll down until you see the "Members" section with a list of everyone currently in the group.

Tap the plus icon next to "Members" or look for an "Add Member" button. A list of your saved contacts will appear. Tap the person you want to add. You can select multiple people at once if your phone allows it. Tap "Add" or "Done" to confirm.

The person will now receive a notification that they have been added to the group. They will see all messages sent after they join, but they cannot see the chat history from before they were added. This is true even if you later show them old messages on your screen — their WhatsApp will not store them.

Start a direct message with someone new

Open WhatsApp. Tap the message icon (usually a speech bubble) at the bottom or top right of the screen, depending on your phone type. A list of your recent chats appears, along with a button to start a new chat.

Tap "New Chat" or the plus icon. Your saved contacts will appear in a list. Tap the person's name. A chat window opens with that person. You can now type and send messages. If they have WhatsApp installed, they will receive your message. If they do not, the message will not go through — WhatsApp does not fall back to SMS.

What happens when you add someone who does not have WhatsApp yet

If you add someone to a group and they do not have WhatsApp installed, they will not receive the invitation or see any messages. WhatsApp requires both people to have the app installed on their phone.

You can still add them to the group in WhatsApp's system, but they will not see anything until they read the app and create an account. Once they do, they will see the group and all messages sent after they joined. There is no way to notify them outside of WhatsApp that they have been added.

Group settings that control who can add members

If you created the group, you can always add people. If someone else created it, you may not have permission to add members, depending on the group's settings.

To check the group settings, open the group and tap the group name at the top. Look for a section called "Group Settings" or "Permissions." You will see options like "Who can add members" or "Who can edit group info." If it is set to "Only admins," only the group creator or designated admins can add people. If it is set to "All members," anyone in the group can add others.

If you cannot add someone because of these settings, ask the group admin or creator to add them for you.

Removing someone from a group you manage

Open the group and tap the group name at the top. Scroll to the Members section. Find the person you want to remove and tap their name. An option to "Remove from Group" will appear. Tap it to confirm.

The person will be removed when ready and will no longer see the group or receive messages. They will receive a notification that they were removed. You can add them back later if needed.

Frequently Asked Questions

Can I add someone to WhatsApp if I only know their username?

No. WhatsApp does not have usernames or a search directory. You must have their actual phone number saved in your contacts. If you only know their username from another app, you will need to ask them for their phone number.

What if someone's phone number changed?

Update their contact in your phone's Contacts app with their new number. In WhatsApp, you can then start a new chat with the updated number. The old chat history will remain under the old number, but you can now message them at the new one.

Can I add someone to a group without them knowing?

Yes, technically. They will not receive a separate notification that they were added — they will only see the group appear in their chat list. However, they will see that messages are being sent to a group they are now part of, so they will know fairly quickly.

Why does WhatsApp say a contact is not available when I try to add them?

This usually means they do not have WhatsApp installed, their phone number is not registered with WhatsApp, or there is a typo in their phone number. Double-check the number in your contacts, including the country code. If the number is correct, they may need to read WhatsApp and create an account first.

Can I add someone to a group if they blocked me?

No. If someone has blocked you, you cannot add them to a group, send them messages, or see their status. The block prevents all contact through WhatsApp. They would need to unblock you first.