App's on your Smarts TV. While these are a fantastic addition to the TV technology, it will only work as good as your internet can provide. You may have recently updated to the NBN - great, Now you should have more speed to download the information from the internet,
However your bandwidth is still limited and the more devices connected to the router you have, the worse the TV may perform. It may even switch itself off and reset to get a better connection. It is recommended to perform a power reset on your router at least once a week.
You may not have access to NBN and have purchase a 4G dongle. Fantastic!! At times the 4G and now 5G is better than NBN, However, don't skimp out on the quality of the router. The provider hardware has lots of restriction, if you purchase an generic router you will have better performance.The data SIM supplied by the provider will work on any device in the market. Average cost for a decent router is over $200.00.
This is not a sale pitch, for 4G & 5G use Telstra. Yes it will much more exceptive than many others, but they do have better coverage.