Matt has a 5G Note 20 and he can't visit a website on 5G. But he can visit it on 4G through AT&T. Leo says that it could be something that the website is doing, that doesn't allow a 5G network to access it. Leo suspects it's a DNS issue, and if he can try an alternate DNS provider, that will fix it. Leo recommends NextDNS or OpenDNS. NextDNS has an app that can fix it.