'Call' in the Bible

As he saith also in Osee, I will call them my people, which were not my people; and her beloved, which was not beloved.

For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.

For whosoever shall call upon the name of the Lord shall be saved.

How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?