[Galaxy Note 4 Q&A, Help & Troubleshooting] Jungack:
Hi guys,

I have a problem as I post a thread. I have recently owned a note 4. Before changing phone, I decided to configure all the note 4 settings and apps, root, install twrp and SD fix. All worked fine. So i did a nandroid backup with the app "online nandroid backup". After that, I transfered my sim from my xiaomi Redmi 1 to the note 4, and I continued doing other things :

- 15th july: I put the sim to the note 4.

- 16th july: I messed up my phone because i accidentaly deleted the google framework odex file. So i wanted to restore the nandroid backup done by the app "online nandroid backup" when I finished configuring my note 4 but it failed. So I re flashed stock rom, re rooted and restored backup from titanium backup.

- 17th july: I installed an apk of nova launcher and configured it. Trust me, it is not the prime version I pay the developer me! I installed the apk from internet instead of the app itself from the play store because I never download from play store.

- 18th july: I found that because I also restored the system data with titanium backup, the private mode didn't work, so I factory reset my phone with twrp and I restored only user app and data backup. I did a nandroid backup after that.

- 19th july: I messed up (again) with tasker and so I hadn't notification sound. I decided to re flash the stock rom but didn't work. After that, I left my home without my phone for 2h and when I came back, I sSAW THE FIRST RANDOM REBOOT.

- 20th july: To solve the sound problem, I decided to restore the nandroid backup. It works: the sound came back! But I saw again a random reboot.

The random reboots appear only two or three times per week: indeed, I remembered the other random reboots appeared on the 25th of July and on the 27th July.

The random reboots are special I think because they appear at any time: it appeared when I use the phone or when I don't use it. Moreover we can see the Samsung logo at the minimum brightness and it is infinite: I need to remove the battery to make it restart.

To solve the problem, I first thought that it was a problem from restoring any backup from titanium backup. So I factory reseted the phone using twrp to keep root and internal storage. Then I reinstalled the apps with the official Google backup and restore tool. But as I can see, the random reboots are still here because on the 27th July, as I said, a random reboot appeared.

- 28th July (so today): I removed nova launcher, then shutdown my phone and pull out the battery. When I reinsert it, the phone takes a long time to switch on. Finally, it said system is not responding and reboot and the message re appeared, and reboot... I must remove the battery and reinsert it to restart the phone correctly: the message doesn't appeared. I tried removing the battery one more time to see if the message apprear when I pull out the battery but it didn't appear. However, there are no reboot since, but I think it is because it appeared tomorrow (27th july), and I have to wait to see if the reboots are still here, but I think yes because of this strange message. Or it may be a pure coincidence?

Please help me with all this strange events! I said all I know!