According to Muhammad, the son of Imam Jaffari Sadiq, the imam said: “WHEN THE QAIM [HAZRAT MAHDI (AS)] APPEARS, he will send an envoy to each country and will say to each envoy: “YOUR AGREEMENT IS IN YOUR HAND. If you encounter a situation you cannot understand and find it difficult to rule on, LOOK AT YOUR HAND AND DO WHAT IS WRITTEN THERE...”
(Sheikh Muhammad bin Ibrahim Nomani, al-Ghaybah al-Nomani, p. 381)
The hadith notes that in the time of Hazrat Mahdi (as), people in management positions will make use of palm computers and computerized telephones to communicate, obtain information or research things they do not know. It seems that in this holy time technology will reach the most advanced level and people will press the keys on palm computers or computerized telephones to access news reaching them or learn things they do not know, and they will see and understand these things by looking at the screens of such devices.