Perhaps someone can help.  I've setup a site at http://phonecount.com which has dynamic counters showing the world population and the number of connected phones at this moment in time.  Given the current rates of increase of both I work out when the total number of connected phones is equals to the total world population - I ended up with 11th June 2012.  I use poetic license to call this "everyone connected day".  Of course not everyone will have a phone, but many people will have more than one phone and this will make up for those without phones.  To me this will be an important day for our industry as conceptually it marks the point that everyone is connected via voice and the Internet.

The question is have I got the right figures?  I got the world population figures from the US Census Office so I think that's OK.  The phone growth figures was taken off the GSMA site and I found this more difficult.  I ended up getting a figure of 200M growth per quarter and then inferred 25.72 additional phones per second.  Does anyone have a better source for this as it seems a little bit of an estimate?  Also has anyone else done this before?  Am I the first?

Also please forgive the blatant advertising of my own product on this site.  I have to justify the effort taken somehow.