An ongoing thread discussing the issue at XDA reveals that there's no particular reason causing the boot loop, which usually happens after the device restarts on its own, requiring a battery pull to fix it. For some users, the boot loop occurs after updating to a newer software version on a new Note 3 and then installing their apps from the Play Store. For others, it happens when the device is intentionally rebooted while the SIM and microSD cards are in the device, though keeping the device in flight mode while rebooting makes it reboot properly.
It seems to be a major issue that doesn't seem to have a proper resolution (even a data wipe doesn't help), though I've personally not run across it on my Exynos model (it has automatically rebooted twice in the three weeks I've had it, but there were no boot loops). It's likely fixable via a software update, and we'll keep our fingers crossed that Samsung acknowledges the issue soon and does what's necessary even sooner.
Have any of you experienced this rather troublesome boot loop issue on your Galaxy Note 3?
Thanks Aniket!
