If prompted, enter your phone number and Facebook password to log in before continuing.

If you see a green switch (iPhone) or the word “On” below Upload Contacts, your phone’s contacts are already synced to Messenger.

If you see a green switch (iPhone) or the word “On” below Upload Contacts, your phone’s contacts are already synced to Messenger.

If you’re on an iPhone, you may first have to enable contacts access for Messenger. To do so, open Settings, scroll down and tap Messenger, and tap the white Contacts switch to turn it on.

If prompted, enter your phone number and Facebook password to log in before continuing.

Skip this step on Android.

On Android, you’ll just tap Add contact and skip the next step.

You can also send this person a message, but they’ll have to accept the message invitation in order to view it. If the number you typed in doesn’t match a Facebook profile, you can tap Invite to Messenger to send an app invitation to the person.

You can also send this person a message, but they’ll have to accept the message invitation in order to view it. If the number you typed in doesn’t match a Facebook profile, you can tap Invite to Messenger to send an app invitation to the person.

If prompted, enter your phone number and Facebook password to log in before continuing.