How to fix Samsung Galaxy J7 that started to run so slow after a firmware update (easy steps)

One of the reasons to consider why the device starts to become sluggish is due to tons of applications running in the background wherein the firmware could no longer cater all of them. In addition, if the system files and some data have been corrupted, that would also be a factor why an issue like this may occur. We have readers that own the Samsung Galaxy J7 who reported that their devices started to stutter or have poor performance shortly after updating their firmware.

In this post, I will help you troubleshoot your phone that may have encountered firmware-related issues after a firmware update. I will walk you through in ruling out each possibility until we can determine the reason why the problem occurs so that we can try to formulate a solution that may fix it for good. So, if you’re one of the owners of this device and are currently having similar problem, continue reading as this article may be able to help you, somehow.

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.

How to troubleshoot your Galaxy J7 that starts to run slow after the update

If the issue started after the update it’s not far that this is just a minor problem wherein some of the files and data may have been corrupted or became outdated and could no longer be loaded. Here’s what you need to do about this problem…

First solution: Reboot your Galaxy J7

Before anything else, try rebooting your phone especially if it’s the first time you encounter this problem. There are cases wherein this issue is caused by some minor glitches in the firmware or with the app itself. Hit that power key and restart your phone but if it doesn’t make any difference, try doing the Forced Reboot instead:

  • Press and hold the volume down and power keys together for 10 seconds or more.

It’s far more effective than just the normal reboot as it refreshes the phone’s memory by simulating battery disconnect. It also reloads all services and core functions of your device. However, if the problem still continues to bug you after this, then move on to the next step.


Second Solution: Run your phone in Safe Mode

Another possibility we have to rule out is the chance that some of the third-party apps may need to be updated as they may already be obsolete and are no longer compatible with the new firmware. Try running your phone in safe mode to temporarily disable all third-party applications. If your phone works perfectly while in this mode, then our suspicion is confirmed. The next thing you need to do is find the app that’s causing the problem and uninstall it. This is how you boot your phone in safe mode:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  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.

This is how you uninstall an app from your Galaxy J7…

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap the desired application in the default list.
  4. To display preinstalled apps, tap Menu > Show system apps.
  5. Tap UNINSTALL > OK.

Determining what app is causing the problem is often a challenge to many users. So, you must uninstall apps that you recently installed first or those that you installed prior to the problem. However, if the issue continues even in this mode, then move on to the next solution.

Third solution: Wipe Cache partition

If there are corrupt system caches, some apps may also crash and this could be the reason why this is happening to your phone. Run your phone in recovery mode and wipe the cache partition so that all the caches will be replaced with new ones:

  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 three keys.
  4. An ‘Installing system update’ message will show for 30 – 60 seconds before the Android system recovery menu options appear.
  5. Press the Volume down key several times to highlight wipe cache partition.
  6. Press Power key to select.
  7. Press the Volume down key to highlight yes, them and press the Power key to select.
  8. When the wipe cache partition is complete, Reboot system now is highlighted.
  9. Press the Power key to restart the device.

Your phone will take a little time booting up after the cache partition is wiped off of its contents as it will rebuild or recreate those caches. If the problem is still happening after this, then you have no other choice but to reset your device.

Fourth Solution: Backup all your files and reset your phone

This is often the answer to almost all issues that are caused by some apps or the firmware. A sluggish performance, while it’s very annoying, is just a minor problem and therefore a master reset can fix it. You don’t have other choice now but to do it but prior to the reset, make sure you make a backup of your important files and data as they will be deleted. After which, follow these steps to reset your phone:

  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.

I hope that this troubleshooting guide can help you fix the problem with your phone. If you have other concerns you want to share with us, feel free to contact us or leave a comment below.

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