Where does this come from, and can I check it?

Motorola engineer Martin Cooper called his rival at Bell Labs using a portable prototype phone. The figure is taken from IEEE Spectrum, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Technology shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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Mondo Knows Facts

The first mobile phone call was placed in New York City in 1973

Motorola engineer Martin Cooper called his rival at Bell Labs using a portable prototype phone

On 3 April 1973, Martin Cooper made the first cellular phone call on a street in Manhattan using a Motorola DynaTAC prototype. The device weighed over one kilogramme and offered a maximum talk time of thirty minutes after ten hours of charging. Cooper called Joel Engel, the head of AT&T's competing cellular research team.

Phone call on beach — Peter Drier · CC BY 2.0 · licence · source

Where this comes from

IEEE Spectrum

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Tags: telephones, mobile, motorola

The first mobile phone call was placed in New York City in 1973: the short answers

Where does this come from, and can I check it?: Motorola engineer Martin Cooper called his rival at Bell Labs using a portable prototype phone. The figure is taken from IEEE Spectrum, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a technology fact?: Yes. It sits on the Technology shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.