My Chromecast used to work with my previous modem / router no problem. We switched to Vodafone wireless Home phone and Broadband and find that our new B315s-607 gets almost there with connecting the Chromecast, but then "fails". There's a lot of settings in the B315. I've enabled UPnP, but could not find to disable:  Access Point, / AP Isolation /Client Isolation / Guest Mode. I'd be guessing with other settings such as Firewall switches, MAC filters etc. etc. I've been through the Chromecast forum problem with setup, and I'm sure that there's a setting on the B315, or else its just not compatable. Be great to know either way. Giving up on it would actually be a relief, and I could go do something more productive. Does anyone know? Vodafone have been embarrassingly useless, and I got nice (but useless) replies from Huawei.