Why can't I install my game but my wifi is working,it says check your internet connection...

Are you using WiFi? This can lead to really unstable connections. Try using ethernet and if that doesn't work then check your internet speed, ISP, and also your server. The fact you are able to connect on mobile and PC says it could be your internet connection.
Also check the number of devices you're able to have on your internet. If it's two or less that's why you can't connect.

Are you trying to play on WiFi? WiFi can lead to really unstable connections. Try using ethernet and if that doesn't work then check your internet speed, ISP, and also your server. The fact you are able to connect on mobile and PC says it could be
your internet connection. Also check the number of devices you're able to have on your internet. If it's two or less that's why you can't connect. You already mentioned however your ISP is saying everything is good on their end. So check your own speed you're
receiving in the house, and check what game server you are trying to play on. You might have too high a ping to join.

it's now saying check your internet connection. Which my wifi is fine.

[quote user="HD ITeRRoRiZe I"]

What im trying to say is:

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If Internet Connection is required to update, then what`s the difference between signing in for the update and signing in for the 24 check? there isn`t a difference. You are still using the internet regardless of which you do.

[/quote]

What if I were to take my Xbox One on a business trip for a week and there's no Wifi in my hotel? I can't use my Xbox because I can't connect to the internet? That's why it's good that the mandatory check in is gone.

Hello,

yes I got a Problem with Teredo.

I'm connected by wifi to a router then to my box.

I checked for the port but I can't open them, my internet box says that I need to open port highest to 32768, so I can't open any of your port.