It communicates with the base station via quad-band cellular signals or via satellite, allowing it to be deployed within a wide range of potentially hostile water, oil, gas and electricity networks.

这种系统通过四频蜂窝信号发生器或卫星与基站通讯，可以在一些潜在的不易操作的水、油、气和电力系统上广泛部署。

youdao

We are specializing in the mobile phone, especially the quad-band dual sim mobile phone.

我们是专门从事手机，特别是四频双卡手机。

youdao

Edit: As astude reader johnnie points out - this device supports 850 MHz which of course makes it a quad band device.

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It goes without saying that these devices carry different radios to cater to regional needs, with the Droid DNA and the J Butterfly both supporting CDMA and LTE on top of UMTS. However, only the Droid DNA comes with quad band UMTS radio, thus making it a better global phone.

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The Lumia 800 is a quad-band phone while the 710 is a tri-band device.

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