Amazing, but a bit different prediction, Heilein (from the link provided) described mobile phones at a time where there was walky-talkies (invented in 1937). Th

Amazing, but a bit different prediction, Heilein (from the link provided) described mobile phones at a time where there was walky-talkies (invented in 1937). The difference between walky-talkies and mobile phones is in the lack of phone switches and base stations, not so much in the terminal. Brunner described phones (not necessarily mobile) that had a camera and a screen and that were used to access encyclopedias. There was at that time ATT's picturephone, but it was point to point connections through the switched network. Given it used a Vidicon tube for the camera an a cathodic tube for the screen, it must have been quite large. And it was not used to find information on online encyclopedias. Hey it was published even before Arpanet was launched!