I've come across a JW friendly article about Watchtower predicting smartphones in the 20s.
Of course, in the comments section there are a lot of JWs freaking out saying "there is no doubt that this is the only true organization!", "thanks Jehovah that used his faithful and discreet slave to tell us some useful information about the future!", "it must be holy spirit's work!", "no one could have known this information with so much anticipation! Jehovah is with us!"
I wonder what would they think when they read that their beloved WT couldn't foresee that shunning was going to be turned into Biblical before writing this article in the 40s:
It is even more interesting knowing that Jehovah considered crucial to reveal the future existence of smartphones but didn't say a word about the overlapping generation before the original generation was almost completely gone.
And of course, Jehovah might have used other people apart from the WT, as there are some postcard images from the early 1900s predicting Skype calls.
Anything you'd like to add?