Strategy Analytics says: Global handset sales to be near a billion this year.

Thems a lot of apples. It seems that soon we will be maxing out the world. Then what?

Link: Global Handset Sales Historical & Forecasts, 2002-2011.

Summary
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Global handset sales will grow 18% in 2006 to 986 million units. In 2007, emerging markets will be at the heart of 10% annual growth in global sales with volumes reaching 1086 million units. 2008 sales are projected to grow 6% to reach 1155 million units. Overall, global sales will grow at a 5.4% CAGR to reach 1286 million units sold in 2011.