If you’re not automatically logged in, follow instructions to register your phone number. You cannot use WhatsApp to search for a contact whose phone number is not already in your contacts.

If WhatsApp opens to a conversation, first tap the “Back” button in the top-left corner of the screen.

You’ll see every contact who uses WhatsApp listed on this page.

You can also just type a contact’s name in the search field at the top of the screen. If a contact is not on WhatsApp, you can invite them to use WhatsApp: scroll to the bottom of the list and tap Invite Friends to WhatsApp, select how you’d like to send the invitation, tap the contacts you’d like to invite, and tap Done at the bottom of the screen.

You can’t search for people who aren’t already in your contacts. You can add a contact if you know their mobile phone number.

If you’re not automatically logged in, follow instructions to register your phone number. You cannot use WhatsApp to search for a contact whose phone number is not already in your contacts.

If WhatsApp opens to a conversation, first tap the “Back” button in the top-left corner of the screen.

All of your contacts who are on WhatsApp will be listed on the contacts page.

You can also just type a contact’s name in the search field at the top of the screen. If a contact is not on WhatsApp, scroll to the bottom of the list and tap Invite Friends to WhatsApp, select how you’d like to send the invitation, tap the contacts you’d like to invite, and tap Done at the bottom of the screen.

You can’t search for people who aren’t already in your contacts. You can add a contact if you know their mobile phone number.