(How many cell phone service providers are there in the world? How many mobile phone users are there in the world? How many mobile phone manufacturers are there in the world? Presumably as long as the first question is answered simply by comparison. Since the release of the MTK mobile phone solution, the number of mobile phone manufacturers has grown like a crucian carp across the river. As the saying goes: "The country is bustling for profit, and the country is bustling for profit." We can see that those MP3 manufacturers in the Pearl River Delta region.)