'Call' in the Bible

As He says also in Hosea,“I will call those who were not My people, ‘My people,’And her who was not beloved, ‘beloved.’”

For there is no distinction between Jew and Greek; for the same Lord is Lord of all, abounding in riches for all who call on Him;

for “Whoever will call on the name of the Lord will be saved.”

How then will they call on Him in whom they have not believed? How will they believe in Him whom they have not heard? And how will they hear without a preacher?