The Greek noun phone means voice, sound, or tone — any audible utterance or sound. It appears approximately 139 times in the New Testament, making it one of the most common nouns. It is used for human voices, animal sounds, musical instruments, and the transcendent voices of God, Christ, the Spirit, and angels.
Phone is central to John's Gospel and Revelation. In John 10, Jesus develops the shepherd metaphor entirely around phone: 'The sheep hear his voice (phone); he calls his own sheep by name and leads them out... My sheep listen to my voice (phone); I know them, and they follow me' (vv. 3, 27). The distinguishing mark of the true sheep is not moral performance but voice-recognition — knowing and following the Shepherd's voice. At Jesus' baptism, a voice (phone) from heaven declares: 'This is my beloved Son, in whom I am well pleased' (Matthew 3:17). The same voice affirms Jesus at the Transfiguration (Matthew 17:5). In John 12:28, the Father speaks audibly and the crowd hears: some say it was thunder, others an angel — but Jesus says the voice came for their benefit. Revelation is saturated with phone: the voice like a trumpet (1:10), the voice of many waters (1:15; 14:2), the voice of the great multitude like the roar of rushing waters (19:6). The book culminates with Christ's invitation: 'Behold, I stand at the door and knock. If anyone hears my voice (phone) and opens the door, I will come in' (3:20).