Yes.
What I said was being connected to cellular is the norm, and Wi-Fi is the exception.
So the amount of time you serve media for is limited.
Discussion
Sure, but in actual usage terms, WIFI is the norm. It's irrelevant that the phone is connected to mobile data if the user is not browsing anything. And when users need to use, most of them that have limited plans find a wifi spot around. Those who have unlimited plans, like in the US, don't care about using their mobile data (unless on roaming).