I second this idea. While I realise it is not possible for you to support all routers natively, it would be a very useful feature to be able to have an API or manual option to add additional consumption for a mobile hotspot that draws off the same pool. Although in general the carrier would provide this sort of functionality, in my case I subscribe through a reseller. Although there is a pool, I only get consolidated usage information when the bill arrives. But I can get usage data from the hotspot itself, it would be nice if this could be reflected on handsets through MDM so those who share the plan can adjust their usage in line with this.
Go to Settings, Scroll down to the Advanced Section, Select Privacy and Data. You will find the Opt-Out toggle there.
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