This API is available on Firefox OS for internal applications only.
Summary
relSignalStrength is a read-only property that gives the signal strength, represented linearly as a number.
Syntax
var dataSignal = navigator.mozMobileConnection.data.relSignalStrength; var voiceSignal = navigator.mozMobileConnection.voice.relSignalStrength;
Value
Return a number between 0 (weakest signal) and 100 (full signal).
This property can be null if there is no signal at all.
Specification
Not part of any specification.