From Tin Cans to Touchscreens: The 40 Most Important Phones in History
With all due respect to Alexander Graham Bell, he couldn't possibly have known that his patent for "the method of, and apparatus for, transmitting vocal or other sounds telegraphically" would one day give birth to the modern day smartphone. He couldn't have foreseen the wonders that we take for granted today, like text messaging and voice-to-text searches.
We now live in a connected world, and today's smartphones define what it means to be a power user. Want to look up turn-by-turn driving directions on your phone? There's an app for that. There's an app for just about everything, even if they're sometimes tough to find (we're looking at you, Android Marketplace).
But for as much as we rely on our iPhone, Nexus One, or BlackBerry, it wasn't that long ago when you wouldn't think of trying to cram a mobile phone in your pocket. Remember when pagers were all the craze? Like computers, communication devices continue to evolve at a rapid pace, becoming faster, more portable, and increasingly flexible in functionality. It's been a wild ride getting to where we are today, and to pay homage to that journey, we take a look back at 40 of the most important phone models of all time.
Tin Can Telephone
You probably thought we were going to kick things off with Alexander Graham Bell's telephone, but we'll get to that in a moment. It just wouldn't be fair to skip over the so-called tin can telly.

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Some of you may have constructed a tin can phone in elementary school as part of a science experiment, and give yourself extra credit if you remember the name Robert Hooke. Considered one of the most important scientists of the 17th century, Hooke discovered a way to "to hear one speak through a wall a yarrd thick...I have, by the help of a distended wire, propagated the sound to a very considerable distance in an instant." What a smarty pants.
Invented: 1664
Alexander Graham Bell's "Electrical Speech Machine"
You can't have a retrospective without a little controversy, and ours starts right at the beginning. How so? We're taking the mainstream route and crediting Alexander Graham Bell with introducing the first telephone. In reality, Bell became the first to receive a patent for what would later become the telephone, but it would be unfair to say he was alone in inventing the device. For that, we have to credit a handful of individuals, each of whom had various degrees of influence in what could be considered one of the most important inventions of all time (agriculture, modern medicine, and beer being some of the others).

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Pictured above is Bell's first commercial telephone. This consisted of a single transmitter/receiver jammed into a rectangular wooden box. The opening was used both to speak into, and to hear the other party.
Invented: 1876
Butterstamp Receiver
In 1877, Alexander Graham Bell, his future father-in-law Gardiner Greene Hubbary, and Thomas Sanders formed what would become the Bell Telephone Company. One year later, the company came up with the Buttersamp receiver, named such because it resembled a dairy butterstamp. If you were to take it apart, you'd find a permanent bar magnet with a coil of wire wrapped around it, along with an iron diaphragm in front of the coil. This would form the basis of many later receivers.

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Early on, chatty Cathies would both speak into and listen through the same device, which meant continually moving the Butterstamp from mouth to the ear. Later on, the receiver and transmitter would consist of two different parts.
Invented: 1877
Pay Phone
In hindsight, Mike Brady should have known better than to call up a client on a home pay phone to discuss a potential multi-million dollar deal, but that doesn't mean his idea to install a pay phone in his living room was flawed. Just the opposite -- we think it was brilliant. The alternative? Fend off six school-age children, half of whom were girls, in the battle for one phone line, and do so before the advent of call waiting, cell phones for the masses, or Facebook. As if!

Mike had it right, and even offered to increase everyone's allowance to accommodate two phone calls per day. Talk about a fair deal, especially when we can't think of a single episode in which these supposed do-gooders were seen doing any chores -- presumably the reason Alice was hired in the first place.
"But I average at least 10 [calls per day]," Jan Brady pleads.
Sure you do, Jan, and since we're all clearly exaggerating, you're also prettier and more popular than Marcia.
Fun Fact: If not for William Gray of Hartford, Connecticut, this famous episode might never exist. It was Gray who first patented the concept of a pay phone over 130 years ago.
Invented (pay phone): 1889
Wilhelm Candlestick
Walter Wilhelm, an electrician by trade, improved upon the Butterstamp receiver and every other phone of the time with his double diaphragm design. Wilhelm phones wouldn't be the first to employ essentially two Butterstamp receivers -- one for talking and one for listening -- but unlike other phones of the time, it came with two separate chambers and diaphragms.

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Other similar looking and functioning phones would follow, but the Wilhelm's fate was sealed when the Wilhelm Telephone Mfg. company tried on more than one occasion to sell its transmitter to Bell. In 1913, Wilhelm Telephone Mfg. went out of business.
Invented: 1896