The solution I'm proposing is explain the feature in a subpage specifically for this feature where there is more space to explain the feature. In this proposal no dialog is used at all.

This is a 'programmer mock-up' of the UI, refinements can certainly be made, but this is the gist of it.

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+1 for using a subpage. I did find it surprising as a user that toggling a slider
 - changes the slider state, but also
 - pops up a modal dialog.
 - Canceling the dialog resets the slider to the original state.

I think the subpage approach is less surprising, and still ensures that the explanatory text is presented to the user.

Minor nit: Maybe having the slider aligned with the primary text, and adding some more margin between primary and secondary text would look slightly better.

> Minor nit: Maybe having the slider aligned with the primary text, and adding some more margin between primary and secondary text would look slightly better.

Yeah, I think that would look nicer too. 

Should/would the explanatory text then wrap edge-to-edge (by going 'under' the toggle); or should it still wrap earlier (like it is in #1 above)?

> Should/would the explanatory text then wrap edge-to-edge (by going 'under' the toggle);

Yes, having the explanatory text take all space under the primary text + slider pair sounds better.

How does this look?

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That looks great to me.

It also has the added benefit that all the explanatory text will be searched, as opposed to not being searched when residing within a dialog.

Clearing my ownership of P2 UI>Settings bugs. Feel free to re-assign once triaging is complete. 

@namratakannan: Any thoughts an this?

1. I agree with approach of providing a subtitle. However, I am wary of taking them to a new page just to read fine print.We can work with Shimi to distill the subtitle string which conveys what the user needs to know before taking the decision to toggle.


2. Wrt to the confirmation dialog behavior, need to check if this is a privacy requirement

Assigning to Namrata, since it seems that there is some UX work/research to be done before this bug is actionable.