It sounds like your new Iphone uses 5G. It may also use: WPA3, a higher level of 802.xxxxx support. Have you checked the phones manual? I happen to be an "Expert" on the Comcast (Xfinity) forum. Use the same forum name there. You might check the forum there. This issue is being discussed there. I know better and only use Comcast for linear cable. I use high-speed DSL through phone company for Internet access. You do not need to join unless you wish to post. Not necessary to do business with Comcast to be a member. It also would require a higher level USB3 connection.
