For what it's worth, check out the wikipedia page on the RAZR, specifically the section on Cultural Impact: http://en.wikipedia.org/wiki/Razr. Key quote: "The RAZR has been said to the 'iPod' of mobile phones. Being the slimmest phone during its release in 2004, it easily stood out amongst other phone models. IT has also been one of the most popular mobile phone models since its first release, until being surpassed by the iPhone 3G in November 2008..."

However, it notes this popularity was never matched outside the USA.

swernli nailed it. Prior to the Razr you could definitely own a cell phone, but it was the first one to dare that putting a phone line in your pocket could be easy, sleek, attractive. It took the extant technology and made it into a piece of future-stuff.