Andy Rubin's new Essential Phone runs Google's (GOOG) Android—which he invented—but his own Ambient OS for the speaker instead of Alexa (AMZN)
The smartphone is turning 25: here's how far it's come -- Verdict
Who invented the touch screen phone? | Cellular Toy Shoppe
Cellphone inventor Martin Cooper: Smartphones aren't optimal | CBC Radio
The History of the Cellphone
Primer teléfono inteligente en exhibición fotografías e imágenes de alta resolución - Alamy
IBM created the world's first smartphone 25 years ago | World Economic Forum
El primer smartphone de la historia no fue un iPhone - El Blog de CaixaBank
The World's First Flexible Smartphone Has Just Been Invented
El smartphone cumple 20 años | GQ
A (Mostly) Quick History of Smartphones - Cellular Sales
World's first 'smartphone' celebrates 20 years - BBC News
The inventor of the smartphone apologizes - Aleteia
World's first wireless flexible smartphone developed - The Economic Times
Smartphone History - The First Smartphone | SimpleTexting
IBM created the world's first smartphone 25 years ago | World Economic Forum
Mobile phone - Wikipedia
Who invented the first smartphone? What is the evolution of the smartphone? - Quora
Martin Cooper | Biography, Inventions, & Facts | Britannica
World's First Smartphone Simon Launched Before iPhone
Smartphone | Britannica
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How Apple's iPhone changed the world: 10 years in 10 charts - Vox
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The iPhone Wasn't the First Smartphone. Here's How It Managed to Change the World | Inc.com
