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If I hold my power button, I presented with the option to "Power off" my device. I touch it, and my phone (a LG Nexus 5 running on Android 4.4 KitKat) indeed turns off. However, it suddenly turns back on. If I power off multiple times, it eventually stays off. Is this normal? Does the phone restart if it is aware of pending updates or something?

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  • No, it's not normal. If you are in warranty, go to the service center. OTA updates aren't triggered automatically. You need to tap it from notification. Jan 13 '14 at 23:37
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Because long pressing the power button on all most any android device(if not all) will reboot the device. It is meant to be the restart button in case on a device something goes wrong, you have the option to hard reset the device.

To correctly shut down a device you have to tap the power button and select the option to power of, or if you are in CWM select "Power off device", or I think you can shut it down using adb to.

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  • This is likely the issue. I haven't observed the reboot issue the past couple days. If I do, I'll look into replacing it.
    – TheBuzzSaw
    Jan 13 '14 at 23:50
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"Power Off"(menu selection) actually reboots my Kit Kat if it's plugged into the computer with USB debugging on. If i disconnect, the power off powers off.

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