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I think you're reaching here.. Why would a smartphone have any less need for this than a laptop? You obviously do not work in a place that has multiple networks.

Considering most people do not have unlimited data usage, connecting to WIFI is a necessity for a lot of iPhone users.

I will say that I have not personally had this issue, but I can fully understand someone's need for it.

ditto this^^
 
I would like this too.

When I get home my phone tends to connect to the 2.4GHz band of my wifi when I'd prefer it connect to the 5GHz band. I only use the 2.4 one when I go upstairs, as further from the router.
 
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