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Instead, it just sits at full brightness (with no timeout!) waiting for your input…or to die.
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That meant you had to enter the PIN or password every time your phone booted–or it wouldn’t boot at all. So, if the phone reboots in the middle of the night, while in your bag, or some other scenario where you won’t see it for a while, you basically miss out on everything that happens-since the operating system isn’t technically loaded, it has no way to generate notifications. In previous versions of Android, Google used full-disk encryption to secure your device. RELATED: How to Encrypt Your Android Phone (and Why You Might Want to)
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Nougat’s Direct Boot and File Encryption, Explained
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