It's true
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The device is called portable WIFI or something like that. It is equivalent to the function of a mobile phone hotspot, which can provide WIFI signals when plugged in. Such devices also require carrier cards to provide data and traffic. And broadband WIFI is different, this kind of portable WIFI due to the relationship between the operator package, their traffic is limited, so it is not suitable for replacing broadband use, in the outdoor or place there is no WIFI can be convenient temporary use. The fee is charged according to the operator's package fee, which is generally not very expensive.