Is is possible to simultaneously use LTE and wifi? Assume a case where you want to stream something from your LTE connection to a Chromecast. You connect the iPhone to the Chromecast using a wi-fi network. If the wi-fi network doesn't have an internet connection (like somewhere without cable or DSL; yes those places still exist, that's why I need LTE), can you get the content on LTE and "Cast" it?
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I have never tried this with my CC, but can you use the phone's mobile hotspot (if enabled) to create a direct connection meaning both the phone and the CC are thereby on the same network?