Very strange coincidence, but while I was sleeping (in the middle of reading this thread) my Kindle for Android app updated. Now it has a setting to disable data usage. It is called "Activity Data" - Automatically use data from this device to provide features through Whispersync for Books. If you disable it warns about possible missing features.
Connection to calling home in DE? If yes, than Amazon is fast in providing an option to opt out.
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