2. Your Network speed is fundamentally determined by your Carriers quality, capacity, etc, much more so then your phone.
3. Latency, Latency, Latency! I don't care if I get 20Mbps or 200Mbps speed. I do care if I get 20ms or 2ms latency. Of course that is for those of us who got decent network, I read in many parts of US you get get sub 10Mbps speed. ( How is that even possible? if you ask most developed Western Europe or East Asia countries citizen they would have decent network by now )
4. We actually need to push the bottom half of the market to support better Modem spec. The more phones support Massive MIMO, LAA or features in later of of 3GPP Rel spec, the faster the overall network is. Which is something I wish Apple had done better.
And Finally, any mid range to high end Smartphone, can consume 10GB + of Data in their theoretical top speed in a matter of few minutes, and that is likely over their data cap / allowance, would a user care more about their Data speed or Data Cap?