My best find is those router firewalls. I noted this at a link to follow. There are other reasons such as "this really doesn't work unless it's a Samsung of a certain series TV" to this other thing.
I am trying to share my phone screen with my TV.
I have a Samsung Galaxy S7 and a Sony Bravia TV. I am trying to use the Smartview function.
I keep getting message 'Preparing to mirror screen', but it never actually connects to the TV. It simply times out.
Any suggestions please?