The document discusses mobile phone market trends. It notes that 78% of teens have cell phones, with 15% having smartphones, showing high penetration among teens. Mobile providers have been able to profit from increased cell phone use. The number of U.S. mobile subscribers grew enormously from 123,000 in 1990 to 45 million in 2005, reflecting huge growth in the overall mobile market globally as infrastructure expanded over that period.

1. Mobile phone Market By Silvestre Cuellar

3. Cell Phone Growth

4. Data for Graph 14mil 12,000 Other 215mil 45,000 Asian 35mil 75,000 European 45 mill 123,000 U.S 2005 1990