How did Andrew become a disciple?

The Bible presents us with two different accounts of how Andrew became a disciple of Jesus. The first account in the Gospel of Matthew says that Jesus saw Simon and Andrew fishing and called them to follow him. The second account in the John 1 claims that Andrew was a disciple of John before he became a disciple of Jesus. John introduced Jesus as the lamb of God and Andrew followed Jesus immediately. Many Bible scholars believe these two accounts are correct, but one happened before the other.