Leonid Kupriyanovich and his cell phones

“Science and Life”, 8, 1957. In 1957, the
magazine “Behind the Wheel” published a photograph of Leonid Kupriyanovich with an LK-1 phone in a car. To the right of the phone is a speaker for hands-free calling. Excerpt from the article “On the phone from the car” :
... Among the stream of cars rushing along the highway "Moskvich". The car is going fast. Her driver is in a hurry - there is a long way ahead to the Great Volga, where his fishermen friends should be waiting. But did they leave?
The driver opened the lid of a small box on the instrument panel and, seeing a round disk of the phone in front of him, dialed the number he needed. He had barely managed to turn the small lever to the “conversation” mark, when a long beep was heard from a loudspeaker built into the visor and almost immediately a woman's voice:
“Hello!” I’m listening ... The
driver slightly brought his head closer to the windshield, in the rack of which there was a microphone window picked up by the grill:
- It's me, Lidia Vladimirovna. What, Vasily left? .. Went to the store? Ask him to call me back ...
Turn the handle in the opposite direction - and the cabin is quiet again. A few minutes later a loud buzzer rang out from the loudspeaker: a fisherman friend called a car from his apartment, which was already ten kilometers from Moscow.
What is it? Fairy tale? A chapter from a science fiction novel? Not at all. A phone in the car, on which you can talk on the go with any subscriber, exists. It was designed and built by a young Moscow engineer L. Kupriyanovich.

Engineer Leonid Kupriyanovich demonstrates the capabilities of a mobile phone. “Science and Life”, 10, 1958.

In 1960, the assembly diagram of such a miniature radio transmitter was also published. By the way, there is a book by Kupriyanovich on this topic: Pocket radio stations .

By 1961, Kupriyanovich’s phone was transformed to a very tiny size.

An important question for the last photo:
Is this true or a myth?