I have always been able to perform screen mirroring from my Android phone to Chromecast without WiFi. The initial setup required a second phone, but after that all I had to do was to enable WiFi hotspot in my cell phone, open Chromecast APP and activate screen mirroring. A few days ago Google released a new version of Chromecast APP that checks if WiFi is connected before enabling screen mirroring. This new APP made my setup not work anymore. Does anyone have a solution, other than keeping the APP in the previous version? Thanks in advance!