I am having the same problem with our iPhones. I’m wondering if I should go back to the previous none Xfi gateway.
I have an XB3 gateway but I could never get wi-fi to work for what I use it for. I spent the money to get a Netgear Orbi and my wi-fi works much better now.
We're having similar wifi issues. I feel like upgrading to XB3 was a bait and switch with an inferior gateway box to get customers to buy the new pods to extend the range better. Our mobile devices experience dropouts now when we try to stream things we recorded on DVR. Also, the offer to upgrade stated that we'd get faster internet speeds, but in reality we have exactly the same download speed.