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How to fix Samsung Galaxy J7 that constantly reboots after software update (easy steps)

The random reboot issue is one of the common problems Samsung Galaxy J7 users are  complaining about. According to them, after updating the software, their device started to restart over and over and refused to charge without apparent reason. There are several factors that may have contributed to the occurrence of this problem but taking into consideration the fact that it started after an up, it’s more likely that it’s a firmware issue.

So, in this article, I’ll discuss the possibilities why the device no longer works normally after doing a major update. We will try to look into each possibility and rule them out one by one so that we would be able to determine the cause and the problem itself. If you’re one of the owners of this phone that’s currently bugged by this problem, then read on as this post may be able to help you.

Before anything else though, if you have other issues with your device, then visit our Galaxy J7 troubleshooting page for we have already addressed several common problems with this phone. Odds are that there are already existing solutions to your problems so just take time finding issues that are similar with yours. If you can’t find one or if you need further assistance, feel free to contact us by completing our Android issues questionnaire. Please provide us with as much information as possible so that it would also be easier for us to troubleshoot the problem. Don’t worry as we offer this service for free, so all you have to do is give us sufficient information about the problem.

Troubleshooting Galaxy J7 that constantly reboots after an update

Problem: Hi guys, this morning my service provider (T-mobile) adv of a software update. After about 10 minutes it looked like the phone was restarting, but just kept flashing the Samsung name constantly without actually coming on. 2 hours later, still the same issue. After 4 hours the battery had died. I plugged the phone into the charger for almost 2 hours, nothing. Changed chargers and outlets, 2 hours later again, nothing. While the phone is now unplugged, it shows the charger picture on the screen, without it actually being connected. Cannot power off. Certainly, not enough power either way for an External Factory Reset. Does that mean I now have an 800 dollar paperweight? Any help you can give will be greatly appreciated.

Solution: It seems like the update you did on your phone was successful but the thing is the caches might have been corrupted during the process and that could be the reason why the issue started. There are couple of procedures that we want you to do to determine if there are other factors that could have contributed to the occurrence of this problem. With all that being said, here’s what I suggest you do about this problem…

Try charging your phone for at least ten minutes

To be certain it’s not the battery causing the issue, all you need to do is to charge your device for 10 minutes and see if it responds to that. If the constant reboots disappear while your phone is charging, then there’s a chance that this problem is due to a failing battery. Now that you know your phone will work properly when it has a stable power source, disconnect it from its charger to see if it would still reboot on its own. If it does, then that confirms our suspicion that this is a battery issue.

If you’re using the original J7 or the 2016 variant, then you could just buy a new battery and replace the one you’re using right now. However, if you’re using the 2017 variant, you need a technician to replace the battery for you since it doesn’t have a removable battery.

On the other hand, if the phone still reboots constantly even when it’s connected to the charger, then continue your troubleshooting.

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Observe your phone in Safe mode

This won’t fix the problem but will give you an idea if this problem is caused by an app or not. When in safe mode, all third-party apps are temporarily disabled so if one or some of them is causing the phone to frequently reboot on its own, then the problem won’t occur when in this environment. Follow these steps to run your device in safe mode:

  1. Turn the device off.
  2. Press and hold the Power key past the screen with the device name.
  3. When ‘SAMSUNG’ appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see ‘Safe Mode’.

Should the reboots disappear in this mode, the next thing you need to do is find the app that’s causing the problem and uninstall it.

Boot it in Recovery mode and wipe the cache partition

If the phone still fail to power on steadily even in safe mode the next thing that you should do is to boot it in recovery mode. This procedure will verify if the device doesn’t have any damaged hardware components that might be preventing it from booting up.

Once the phone starts in this mode, wipe the cache partition so that all system caches will be deleted and replaced. Sometimes corrupt caches may also result to performance issues like this…

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds, then ‘No command’ before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight “wipe cache partition”.
  5. Press Power button to select.
  6. Press the Volume down key to highlight “yes” and press the Power key to select.
  7. When the wipe cache partition is complete, “Reboot system now” is highlighted.
  8. Press the Power key to restart the device.

Should the problem persist after this, then get ready to bring it to the service center but before that, I suggest you reset your phone if possible to clear off your personal information and files. It’s also the last troubleshooting procedure you can do in a bid to fix the problem.

Before the reset, make sure you make a backup of your important files and data as they will be deleted. Then disable the Factory Reset Protection so that you won’t be locked out of your device after the reset…

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds, then ‘No command’ before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight “wipe data / factory reset.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, “Reboot system now” is highlighted.
  9. Press the Power key to restart the device.

Bring your phone to the service center

If the device still refuses to turn on after all the methods you performed, then there’s nothing more you can about it except bring it to the tech. If it’s provided by your carrier, it may be replaced depending on the evaluation of the tech. If it suffered from liquid and/or physical damage, warranty is automatically voided and you may have to pay for the services of the tech or you won’t eligible for a brand new replacement.

I hope that this troubleshooting guide can help you fix the problem with your phone. If you still need our help after this, then feel free to contact us.

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