This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
state is a read-only property that gives the state of the network operator.
var operator = navigator.mozMobileConnection.data.network.state
Return a string.
Possible values are:
If the state of the network operator is unknown, this property is
Not part of any specification.