Everyone of you may know the following situation. You are waiting for call but have to leave your home.
For example you await a call from your smartphone shop. If you would know that the shop has called that you’re phone is ready, you could detour while driving home.
If you own a Fritzbox with VoIP as your router, you belong to the lucky winners in this situation.
This is because you can listen to the messages from the Fritzbox’ answering machine from any phone and anywhere. And this is even not a premium service. For retrieving the messages you only pay the same than for a normal call to your home. So if you’ve got a flatrate it will cost you nothing.
Setting up Fritzbox answering machine for remote access