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).
Vitor, do U have a guesstimate on the longevity of phone plans?
Longevity? Of the plan or the phone?
plan on the phone as it is today
different comms
I am not sure what you mean, but average data plan is about 3GB at a download speed of 40MBps.