The name and fame of Hazrat Mahdi (as) will constantly spread during the End Times. The Internet, television and radio will play a major role in this.  The hadith of our Prophet (saas) say that the renown of Hazrat Mahdi (as) will spread by way of images and videos carried over the Internet, and through television and radio:


The imam [Hazrat Mahdi (as)] will (spiritually) conquer the East and West and bring Islam (the morality of Islam) to rule across the world... ALMIGHTY ALLAH WILL GIVE PEOPLE SUCH POWER THAT EVERYONE WILL HEAR HIS [HAZRAT MAHDI’S (AS)] WORDS, WHEREVER THEY MAY BE, and the imam (as) will give life to Islam... 1


It is certain that in the time of QAIM [HAZRAT MAHDI (AS)] IF A BELIEVER IS IN THE EAST, HE WILL PERSONALLY SEE HIS BROTHER IN THE WEST. IF HE IS IN THE WEST, HE WILL SEE HIS BROTHER IN THE EAST. 2





It is also indicated in the hadith that through such means of communication as the Internet, television and radio, every community will be able to see images of Hazrat Mahdi (as) and listen to his words, translated into their own languages, from anywhere in the world:


In the Iqdud Durar he says: THIS SOUND WILL COVER THE WORLD AND EVERY PEOPLE WILL HEAR IT IN THEIR OWN TONGUES. 3


There will be a voice from the sky to the people of the Earth, SUCH THAT EVERYONE WILL HEAR IT IN HIS OWN TONGUE. 4


A voice from the sky will call him by his name, AND EVERYONE IN EAST OR WEST OR EVEN ASLEEP WILL HEAR THAT VOICE and wake up. 5


Another hadith suggests that Hazrat Mahdi (as) will answer all the questions put to him by people regarding matters they are curious about concerning the East (the Muslim world) and West (the Christian world) and that people will witness these. 

By means of the Internet and television, technology that advances during the End Times, people all over the world will witness the statements made by Hazrat Mahdi (as):



...  HAZRAT MAHDI (AS) WILL ANSWER ALL QUESTIONS ABOUT THINGS BETWEEN THE EAST AND WEST. 6
 

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1 (Bihar al-Anwar, V. 52, p. 279 and V. 53, p. 12 Ikmal al-Din, V. 2, p. 367)
2 (Bihar al-Anwar, V. 52, p. 391)
3 (Al-Burhan fi Alamat al-Mahdi, p. 51)
4 (Muhammad Ibn 'Abd Al-Rasul Al-Barzanji, Portensts of Doomsday, p. 201)
5 (Al-Burhan fi Alamat al-Mahdi Akhir al-Zaman p. 37)
6 (Ibn Hajar al-Haytami al-Makki, POrtens of Awaited Mahdi, Al-Qawl Al-Mukhtasar Fi alamat Al-Mahdi Al-Muntazar, p. 56)
7 (Sheikh Muhammad bin Ibrahim Nomani, al-Ghaybah al-Nomani p. 283)