I have checked on the data usage for a number of my apps and the results are very interesting.
On some apps which I have very definitely used,it shows "No data used" under Data Usage.
For other apps, it does show that I have used data. And when I click on the Data Usage, it indicates that the data was used by that app and how much of it was used in the foreground and the background.
On the Sound Recorder app which I haven't consciously used, it shows 1.5 MB of data usage. However, when I click on the Data Usage, it shows the data was used by the Android OS in the background.
Haven't a clue what all that means. However, I'm none too worried. I doubt anyone would glean much of value from random snippets of my conversations, especially as I rather doubt that they have put very high quality microphones in the device.
I'd be more worried about what Google and other such companies are capturing from my internet searches and emails.
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