I can also reproduce this with RN 0.29.0. I was running on 0.26.2 earlier and it worked fine with it. Going to try building from source and debug.

+1

I've reported the same issue before: #8469

Quick workaround is to add an event handler NetInfo.isConnected.addEventListener('change', Function.prototype)

+1 and same issue with NetInfo.fetch().done() - always returns unknown

I solved it this way:

componentDidMount() {
  const dispatchConnected = isConnected => this.props.dispatch(setIsConnected(isConnected));

  NetInfo.isConnected.fetch().then().done(() => {
    NetInfo.isConnected.addEventListener('change', dispatchConnected);
  });
}

+1

we have found this bug in 0.29.2..

we have found this bug in 0.28

0.30.0 still not working

The relevant code hasn't changed so it makes sense that it's still not working.

Note that I previously reported the bug here: #8469 where it details the cause and has sample code attached. Because of this, I think it makes sense to leave this closed.

The number of open RN issues grows daily so it's important to do our part and consolidate where possible.

I noted the same Issue today

I am using 0.30.0 version , And i'm also found this error.

the same issue to me, I am using RN@0.30.0 and the fetch always return unknown.

But we can use addEventListener instead.

NetInfo.addEventListener('change',
    (networkType)=> {
        this.setState({networkType})
    }
)

instead of:

NetInfo.fetch().done(
    (networkType)=> {
        this.setState({networkType})
    }
)