Model : Archer C1900

Hardware Version :

Firmware Version :

ISP :

Hello, I just bought Archer C9 V4 a few days ago and im still having problems with it. For the time being im using my old router.
So im having quite some problems, the first one is that after connecting everything correctly the internet is not working. I even went to the IP the do the setup but it ended in a error.
The second is that the TV stopped working with the new router, bue after connecting to the old one it started working again.
And finally, am i able to connect my home phone to the router? In my older one it has a connecting just for home phones.

Thanks