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Q: What iPhone model is Steve Jobs introducing in this photo?

A: iPhone 4

Q: Which iPhone model was released in the color green?

A: iPhone 5C

Q: Can you identify this iPhone just by looking at its rear?

A: iPhone 3GS

Q: It's so cute and tiny! What is it?

A: The original iPhone

Q: What is the first iPhone model to use Lightning cables?

A: iPhone 5

Q: Only one iPhone model comes in this shape and color. What is it?

A: iPhone SE

Q: "Pardon me, sir. That phone in your hand, what is it?"

A: iPhone 7

Q: What was the first iPhone model released in gold?

A: iPhone 5S

Q: What iPhone model is this?

A: iPhone 4S

Hint: It was the first generation of the Apple iPhone to have a glass back.

Caption by / Photo by TechRepublic

The iPhone 4 was announced on July 7, 2010, at the Apple World Wide Developers Conference. It was the first iPhone ever offered for sale by Verizon, ending Apple's exclusivity deal with AT&T.

Caption by / Photo by Justin Sullivan/Getty Images

It's been the only iPhone model to date that uses the bold color.

Caption by / Photo by Justin Sullivan, Getty Images

The iPhone 5C, available in blue, green, yellow, pink and white, was released in the U.S. on Sept. 20, 2013.

Caption by / Photo by Sean Gallup/Getty Images

The plasticky, white backing of the phone should be a giveaway.

Caption by / Photo by Justin Sullivan/Getty Images

The third-generation iPhone 3GS, released on June 19, 2009, was the first iPhone to be released in white. It was the also the first model to feature voice controls.

Caption by / Photo by Justin Sullivan/Getty Images

The rear of this phone is silver, with a black band at the bottom.

Caption by / Photo by Shaun Curry/AFP/Getty Images

The original iPhone cost a whopping $600 (with a two-year contract, later reduced to $400) when it launched on June 29, 2007, but that didn't stop people from forming a quarter-mile-long line at Apple's flagship store in NYC to be the first to get it.

The device was revolutionary, of course, but many criticized its lack of 3G connectivity at the time.

Caption by / Photo by Michael Nagle/Getty Images

Before this, iPhones used larger 30-pin dock connectors.

Caption by / Photo by Justin Sullivan/Getty Images

The phone, released on Sept. 21, 2012, was also Apple's first to have a 4-inch screen.

Caption by / Photo by Martin Bureau/AFP/Getty Images

Hint: It also has a 4-inch screen.

Caption by / Photo by Anadolu Agency/Getty Images

The iPhone SE, released on March 31, 2016, is based on the iPhone 5S design. Unlike the iPhone 5S, however, the iPhone SE is available in the Rose Gold color.

Caption by / Photo by Josh Edelson/AFP/Getty Images

Certainly no other Apple smartphone looks quite like this one.

Caption by / Photo by Josh Edelson/AFP/Getty Images

The new iPhone 7 features a dual rear camera and upgraded hardware. It doesn't have a headphone jack, though, as the phone's critics love to note.

Caption by / Photo by Spencer Platt, Getty Images

Hint: Its home button was surrounded by a metallic ring.

Caption by / Photo by VCG via Getty Images

This was also the first iPhone model to have a built-in fingerprint scanner.

Caption by / Photo by Portland Press Herald/Getty Images

The presence of Siri on the device is a big hint; this is the first phone she ever appeared on.

Caption by / Photo by Oli Scarff/Getty Images

Siri was a major selling point of the Apple iPhone 4S, released Oct. 14, 2011.

According to Apple CEO Tim Cook, the "S" in the phone's name stands for Siri.

Caption by / Photo by Irfan Khan, LA Times/Getty Images
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