Growth in the number of wireless customers looked like the solution for a while, but only as long as the U.S. market was less than saturated.

无线用户的数量增长看起来是暂时的解决方法，而这也只是因为美国市场还处于欠饱和状态。

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Furthermore the number of channels envisioned in most wireless network schemes is still very small, and the range large (50-100 meters), so that the total number of mobile devices is severely limited.

此外，在大多数无线网络计划设想的管道数量仍然是非常小的，而范围大(50 - 100平方米)，因此使得移动设备的总数量受到严格限制。

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Wireless devices, however, introduce a number of different factors that make the transmission of this signal a lot more difficult.

而无线设备面临很多不同的因素可以使得信号的传输更加困难。

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These include Sierra Wireless, Novatel Wireless, and a number of wireless chipset vendors.

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At Verizon Wireless, the number of text messages sent by its retail customers dropped from an average of 2, 110 in the third quarter of 2010 to 2, 068 in the fourth quarter, then reached 2, 104 in the first quarter of this year.

WSJ: Cellphone Carriers Face Pressure Over Texting

Vodafone recently joined Verizon Communications as a major investor in Iusacell, Mexico's number two wireless operator.

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