How to Fix Slow Response on OnePlus 9/9R/9 Pro [Troubleshoot Lag or Slow Performance]

Slow Response on OnePlus 9
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It would be really annoying to see slow performance after you invest a big chunk of your savings in a flagship smartphone. If you see the specs sheet of flagship series like the OnePlus 9 then slow performance issues are the last thing you expect. If you are still getting these issues, I can help you to fix the slow response on the OnePlus 9/9R/9 Pro.


In this article, I am going to show you some simple steps you can take to fix slow response on the OnePlus 9/9R/9 Pro.

As mentioned earlier, the OnePlus 9 series is loaded with all the top-notch hardware that you would need for optimum performance. So if you are getting slow performance, the hardware does not really have anything to do with it. There might be some software problem or some other problem that you can easily fix. My solutions will help you to fix the slow response on OnePlus 9/9R/9 Pro so make sure to try all of them.

Fix Slow Response on OnePlus 9/9R/9 Pro

By Restarting Your Device

Restarting your device before trying any other method to fix the slow response on OnePlus 9/9R/9 Pro is the thing that you should do. It is the ultimate solution for all the problems on your device.

I am assuming that everyone owning a OnePlus 9 series flagship knows how to restart their smartphones. Just long-press the power button and you will see the restart option. If you are unable to tap on the restart button, you can do a forced reboot. To do it:

  • Press and hold the Power and Volume buttons at the same time.
  • Now hold the Power button for about 15 seconds and you will hear the phone vibrate.

Now your device will restart on your own. If it doesn’t, you can just turn it on by pressing the Power button for about 2 seconds or so.

By Checking for Internal Storage

Usually, you expect your smartphone to work efficiently even if its internal storage is full. This is not really the case with Android smartphones, unfortunately. When you fill up your internal storage above 80%, you might start to notice a slow response. To fix the slow response on the OnePlus 9/9R/9 Pro, you can check the storage of your device from the settings and make sure that it is below not used completely. You can always take backup of photos on your drive and you can take backup of the videos on your computer/laptop.

Slow Response on OnePlus 9

By Clearing Cache from Recovery Mode

You can fix a lot of problems by clearing cache from Recovery Mode. Here is how you can do it:

  • Switch off your OnePlus 9/9R/9 Pro.
  • Now press and hold the Power button and the Volume Down button at the same time until you see the recovery mode options on your device.
  • When you see the recovery options, you can take your hands off the two buttons.
  • Now you will see the Recovery menu.
  • You have to use the Volume button to go to ‘Wipe Cache Partition’.
  • Press the Power button to confirm the selection.

Now let the process complete and once it is done you can turn on the device by pressing the Power button.  


By Resetting the App Preferences

You see, oftentimes there is some software conflict that can cause overheating issues and by resetting the app preferences, all the apps will restore to their original settings. Here is how to do it:

  • Go to the ‘Settings’.
  • Navigate to ‘System’.
  • Tap on ‘Reset options’.
  • Tap on ‘Reset app preferences. Finally, tap on ‘Reset apps’.

That’s it and this will reset your app preferences. It will not clear any personal data. However, it will reset app notifications, default apps, VPN configurations, app permissions, clear all paired devices, remove all WiFi passwords, etc.

By Checking for Faulty Apps

If there is some app that is causing slow performance issues on your device, chances are that it is also draining a lot of battery from your smartphone. You can check the battery usage in-depth by apps. Just go to the ‘Settings’, navigate to ‘Battery’, and tap on ‘View detailed usage’. Do this by the end of the day and see what apps are draining the most battery. Normally it is the OnePlus Launcher that uses the most battery and other apps will use about 2-3% of battery if they are not graphic heavy. So if you see an unusual app here, it is time to uninstall it.  

Slow Response on OnePlus 9/9R/9 Pro

By Troubleshooting Apps in Safe Mode

Safe Mode disables all the third-party apps on your smartphone temporarily. By doing this, you can detect the apps that could be causing problems. Here is how to turn on Safe mode:

  • Press and hold the power button on your OnePlus 9/9R/9 Pro.
  • Now hold ‘Power off’ on your screen.
  • You will now see the option to boot your device in safe mode, tap OK to reboot into Safe mode.

Now you can easily see which of the apps were creating the problems. In case you find any app that was causing the issue, you can uninstall it and that shall fix the issue for you.

By Resetting Your Phone

This is the last option that you can try from your side. It will reset your phone and clear it out of any data. Make sure that you take a backup of all of your data before doing this. Here is how to do it:

  • Go to the ‘Settings’.
  • Navigate to ‘System’.
  • Tap on ‘Reset options’.
  • Tap on ‘Erase all data(factory reset).
  • Finally, tap on ‘Erase all data’ to confirm the reset.


So that was all about how to fix the slow response on the OnePlus 9/9R/9 Pro. If the above methods do not work for you, it is probable that your device might have some faulty hardware. In that case, you should reach out to the nearest OnePlus Support Center for help.

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