If you know someone who has died, you probably believe that they are safely in heaven. That may not be true. If they are in heaven, when you call them through the ether, you will be able to speak with them. If they are in hell, you can never speak with them. You will call, but they will not hear you calling. Nor will you hear any response from them. In fact, you may not be able to even say their name. If that is the case, you should stop calling them.
Even if you can speak with those in heaven, you should never ask for spiritual advice, physical advice, or advice of any kind. Your only source for advice should be the indwelling Holy Spirit Of God, and the saints who are still alive in the earth.
The Lord God Almighty El Shaddai