[Galaxy Note 3 Q&A, Help & Troubleshooting] Skeleton:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Purpose

Synopsis

- This is my report of encountering a Double Boot-Loop.

- My report serves to show that the problem/bug occurs on stock (non-rooted) phones also.

- I have attempted to ascertain the exact triggering event to this bug/problem.

- Note, this Double-Boot-Loop is self-terminating after two boot loops, for which the device is fully operational thereafter. However, when the user initiates a manual reboot, then the double boot-loop reoccurs.

- My hope is that Google and Samsung read such reports on this Forum.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Reference

- This problem has been reported elsewhere on many rooted phones.

- There have been suggestions that this event might be triggered by either:

1) Selinux flag,

2) Knox hardware/software.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Overview

My device

- Samsung Galaxy Note 3

- Stock rom (not rooted)

- Locked to Canadian Bell phone network

What I did do:

- Configure device for user accounts, etc.

- Install apps from Google Play Store.

What I did not do:

- Unlocking of phone was not initiated.

- Rooting of ROM was not initiated.

- Knox security was not activated.

- No apps were installed from third party sources.

- All apps were installed on resident device (not extSdcard).

What worked:

- The factory startup.

- Configuring android settings.

- Creating email accounts.

- Installing apps from Google Play store.

What failed:

- Double-Boot-Loop occurred only after 17 Apps were installed.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Procedure

Procedure leading to boot-loop event:

- I installed 15 initial Apps, then did a reboot.

- Device performed a proper Single-Boot-Loop ... Good.

- In installed 35 more Apps, then did a reboot.

- Device performed a buggy Double-Boot-Loop ... Bad.

- I uninstalled each of the 50 Apps.

- When I uninstalled one, I did a reboot and observed if a double or single boot-loop occurred.

- Each 32 apps of the 50, individually uninstalled, caused a double boot-loop.

- Eventually I had removed 33 Apps, leaving 17 Apps installed.

- At this point the device did a Single boot-loop.

- Without changing the installation count from 17,

- I performed 10 manual reboots. In all but one case a single boot-loop occurred.

- There was one random incident	of a double boot-loop.

- I added another App (totally 18 installed). At this point a manual reboot resulted in a double boot-loop.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Followup

- I reduced to total count of installed Apps to below 15, then progressive added more Apps. This time, I would initiate a manual reboot of each individual App installation. The motive there was to allow the Android device to reset of complete any potential pending activities associated with each installation. However, this did not prove to prevent the problem from occurring once the App count got over 15 total.

- I have done a Factory-Reset twice more, and repeated the above procedure. In those subsequent cases I uninstalled the excessive Apps (more than 15) in differing sequences. This was intended to identify a potential culprit App that might be triggering the event. Such did not occur. No one App was found to be the culprit. Instead, the event was always triggered merely by the quantity of Apps installed.

- In one of the Factory-Reset cases, I installed over 50 Apps. At such a high quantity of Apps, the device would occasionally perform a Triple-Boot-Loop.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Conclusions

- This problem/bug occurs on non-rooted stock phones.

- This is triggered by installing more than about 15 Apps.

- This is remedied by reducing the installed Apps to no more than about 15 Apps.

- The number of boot loops can exceed two loops; this occurs when the quantity of installed apps exceed somewhere above 50 Apps.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Recommendations

- I suggest that rebooting after each App installation is not necessary, and does not prevent the problem/bug from eventually arising.

- For users intent on installing more than 15 Apps, I suggest proceed regardless.

- The Double-Boot-Loop merely lengthens the boot sequence from a proper 1-minute for a Single-Loop to 2-minutes for a Double-Loop. Once the boot sequence has concluded, then the device seems to perform properly thereafter within that power-on session. Of course, the next reboot will repeat the multiple boot loops.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Proper reboot

Event:	Proper boot sequence

Result:	Single boot sequence

M:SS	Sound	Display	Comment

-----	-----	-------	----------------

0:00	-----	Samsung	I reboot device

0:10	-----	S.G.N.3	Model

0:30	Music	SAMSUNG	Company

0:50	Beep	Homepage	Lock screen, Login

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	Buggy reboot

Event:	Boot-Loop sequence

Result:	Double boot sequence (*)

M:SS	Sound	Display	Comment

-----	-----	-------	----------------

0:00	-----	Samsung	User initiated reboot

0:10	-----	S.G.N.3	Model

0:30	Music	SAMSUNG	Company

0:50	Beep	Homepage	Lock screen, Login

*	1:10	-----	Samsung	Device initiated reboot

*	2:00	Beep	Homepage	Lock screen, Login

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~