The documentation for the Microsoft.Phone.Shell.ShellTile class states that we need to specify the ID_CAP_NETWORKING capability in the app manifest. Do we really need it? It's strange that we need to enable networking capabilities for the tile functionality... And my tests on the emulator and real devices confirm that we do not need this.
If your data for tile is coming from any API, for that accessing network ID_CAP_NETWORKING Capabilities is needed to Project otherwise its not needed to be added. For Displaying Static data from App There is no need of it. Without it, Static Text or data would be displayed properly.