World's first 'smartphone' celebrates 20 years - BBC News
The history of smartphones: timeline | Smartphones | The Guardian
Smartphone History - The First Smartphone | SimpleTexting
On the origin of the smartphone - Fifteen Eighty Four | Cambridge University Press
Smartphone | Britannica
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How Apple's iPhone changed the world: 10 years in 10 charts - Vox
Smartphone | Britannica
Cell phone history: From the first phone to today's smartphone wonders
When did smartphones get so smart? - intechnologySmartCities
The smartphone is turning 25: here's how far it's come -- Verdict
On the Origin of the Smartphone – Product Evolution
The smartphone is turning 25: here's how far it's come -- Verdict
Mobile phone - Wikipedia
Smartphone - Wikipedia
What was the first smartphone?
iPhone throwback: The original 2007 iPhone started the smartphone revolution | Mobile News
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Smartphone History: The Timeline of a Modern Marvel
A brief history of the telephone | World – Gulf News
History of mobile phones | What was the first mobile phone?
First Smartphone: Fun Facts About Simon | Time
Smartphone innovation in the third decade of the 21st century | MIT Technology Review
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What Is a Smartphone? A Mobile Phone and Computer In One Device
Who invented the first smartphone? What is the evolution of the smartphone? - Quora
Cell phone history: From the first phone to today's smartphone wonders
IBM created the world's first smartphone 25 years ago | World Economic Forum
