Open the Contacts app on your iPhone
Select the contact you want to share
Scroll down and tap Share Contact
Choose a sharing method such as Messages, Mail, AirDrop, or another app
Select the recipient
Tap Send
To share multiple contacts, use a third-party app or export them from iCloud and share the file
To share contacts from another iPhone, use AirDrop or sync contacts with iCloud
To share contacts from Android, export the contacts as a vCard file and import them to iPhone
