Do you have contacts in Android?
Import contacts from Android by following the instructions Android – Import contacts from phone/tablet to system
Do you have contacts on your iPhone/iPad?
Import contacts from iPhone / iPad following the instructions in iOS – Import contacts from iPhone / iPad to the system. .
Do you have contacts on file?
Import the contacts from the file as instructed Importing contacts from a file into the system
Do you have contacts in Google Contacts?
Import contacts from Google Contacts by following the instructions for Importing from Google Contacts into the system
Done!