Our Prophet (saas) foretold that people would see and hear Hazrat Mahdi (as) when he appears, even if they live a long way from him, by using advanced technology

When our Qaim [Hazrat Mahdi (as)] appears, Almighty Allah WILL PROVIDE MEANS WHEREBY EVEN PEOPLE LIVING MANY MILES AWAY WILL BE ABLE TO SPEAK TO, SEE AND HEAR OUR QAIM FROM WHEREVER THEY MAY BE. (Mu’jam Ahadith al-Imam al-Mahdi, Vol. 4 p. 57 and Bihar Vol. 52 p. 336)

Our Prophet (saas) has said that in the time of Hazrat Mahdi (as) people will be able to see him and hear what he says, even if they live nowhere near him. There was no such technology available either in the time of our Prophet (saas) or in the following 1400 years. However, the advanced technology of the Hijri 1400s, the time of the coming of Hazrat Mahdi (as) makes it possible for people to obtain sounds and images, either by using mobile phones or else using computers and other such technological equipment. This technology will permit people across the world to watch and listen live to Hazrat Mahdi (as), who appeared in Hijri 1400. (Allah knows the truth.)