Bug: Random restart and boot loop
samsung galaxy note 3 top screen angleA number of Galaxy Note 3 owners have reported random restarts where the device just reboots unexpectedly. Some unfortunate people have encountered a boot loop where the phone just continually reboots. It’s not entirely clear what is causing this. It could be something to do with apps trying to update, or it could be related to there being too many apps or services trying to start up.
It seems likely to be a software glitch of some kind and you would expect Samsung to release a patch to fix it, but there’s no telling how long that might take. In the meantime you could take your Galaxy Note 3 back to the retailer and ask for a replacement. Some people report the same issue with the replacement; others have suggested that their replacement model works perfectly.
There are others things to try.
Remove the battery and the SD card.
Put the battery back in and turn on the device.
Try Menu > Settings > Wi-Fi > Menu > Advanced and uncheck Always allow scanning.
Now you should be able to turn the device off and reinsert the SD card.
Boot it up and your problem might be gone.
You could remove the SD card, backup the data, put it back in the phone and try reformatting it via Settings > Storage > Format SD card .
If it’s stuck in a boot loop and you can’t get in to the main menu, you could factory reset the Galaxy Note 3 using the hardware buttons (but you will lose all data on it). Back up first if you can, and then:
Turn off the device.
Press and hold the Volume up, Home, and Power buttons.
When you see the Galaxy Note 3 logo, let go of Power.
When you see the Android System Recovery screen let go of Volume up and Home.
Press Volume down to highlight wipe data / factory reset.
Press Power to select it.
Press Volume down to highlight delete all user data.
Press Power to select it and wait until it’s done.
Highlight reboot system now and select it with Power and your device will reboot.