The mobile phone market continued growing in the early 2000s as infrastructure costs decreased and subscriber numbers increased. By 2001, cell phone towers covered 98% of the US and network providers could add 15% more customers for each dollar invested in infrastructure, up from 5% previously. This increase in efficiency helped providers become profitable. To further expand, providers either grew organically or through joint ventures with foreign companies, allowing them to capitalize on growing overseas markets like China.

1. Mobile Phone Market Continues To Grow Mobile A network

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