How to fix HTC U12/U12+ that keeps rebooting randomly (easy steps)

Some of our readers that bought the new HTC U12/U12 Plus reported that their devices started to restart randomly. The reboots may occur a few times a day but the thing is that it’s very annoying considering you wouldn’t know when your device turns off. If you’re composing a text or an email and your device reboots, you may have to compose your message again. If you’re on a phone call, then it will  be disconnected and it’s not just acceptable that a premium and brand new phone has this problem.

So, in this post, I will walk you through in troubleshooting your phone that keeps on rebooting by itself. We will try to look into every possibility and rule them out one by one until we can determine what the problem really is. If you’re one of the owners of this device and are currently bugged by a similar issue, continue reading as this post may help you one way or another.

Now, before anything else, if you have other issues with your phone, make sure you drop by our troubleshooting page for we have already provided solutions to hundreds of problems reported by our readers. Odds are that we may have already provided a solution to the problem you currently have so try to find issues that are similar with yours on that page and feel free to use the solutions we suggested. If they don’t work or if you need further assistance, fill up our Android issues questionnaire and hit submit to contact us.

How to fix HTC U12/U12+ that reboots by itself randomly

You should know that a random reboot could be a sign of either a firmware or hardware problem. We can try to rule out the first possibility and if we arrive at a conclusion or if everything points to a possibility of a hardware problem, then you need to let the technician take care of the problem for.

The first thing you have to do is make sure there are no signs of physical and/or liquid damage on your phone because if there is, then there’s no point in troubleshooting it. So, assuming your device hasn’t been dropped or submerged in water but this problem started, here’s what you should do…

First solution: Use your phone in safe mode

You should immediately try to rule out the possibility that the problem is caused by a third party application because if it is, then it’s pretty easy to fix. To do this, you have to run your HTC U12 in safe mode to temporarily disable all third-party apps. If the problem doesn’t occur while the device is in that mode, then it’s clear at this point that the cause is a third party. Find out which app causes the problem and then uninstall it and you should be able to continue using your phone without worrying too much about whether it reboots by itself or not.

Here’s how to run your phone in safe mode:

  1. Press and hold the Power key.
  2. On the screen, touch and hold Power off under ‘Phone Options’.
  3. When the ‘Reboot to safe mode’ message appears, tap RESTART.
  4. When the phone restarts it will be in safe mode.

Now, to uninstall applications, you have to do these simple steps:

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Scroll to ‘PHONE’ and tap Apps.
  4. If necessary, scroll to the ‘DOWNLOADED’ tab.
  5. Tap the desired application.
  6. Tap Uninstall.
  7. Tap OK.

On the other hand, if your phone continues reboot by itself even in safe mode, then it could be a problem with the firmware.

Second solution: Wipe cache partition

One of the most common causes of a random reboot issue is when there are corrupt system cache used by the firmware. You won’t know immediately if this is really the case that’s why the next thing you should do is wipe the cache partition so that all caches will be deleted and replaced. If the problem is fixed with it, then that confirms our suspicion. Here’s how you do it:

  1. Be sure the phone is off.
  2. Press and hold the Volume Down key.
  3. Turn the phone on by pressing the Power key until the phone vibrates, then release Power.
  4. Continue holding the Volume Down key.
  5. Release the Volume Down key when the black screen with red and blue lines of text appears.
  6. Press the Volume Down key repeatedly until reboot to bootloader is highlighted.
  7. Press the Power key.
  8. The device will display a white screen with colored text.
  9. Press the Volume Down key repeatedly until BOOT TO RECOVERY MODE is highlighted.
  10. Press the Power key. The screen will flash HTC, wait for the next screen.
  11. Press Volume Down key to highlight wipe cache partition.
  12. Press the Power key.
  13. Press the Volume Down key to highlight Yes on the ‘Wipe cache?’ screen.
  14. Press the Power key.
  15. Once complete, press the Power key again to select Reboot system now.

If the problem still occurs even after this, then the next thing you should do is a reset.

Third solution: Backup important files and reset your phone

This is the last step you have to do and if the problem isn’t fixed, then you should bring your phone to the shop so that a technician can check it up for you. Before the reset though, make sure to backup all your files and data as they may be deleted especially those that are saved in your phone’s internal storage.

  1. Be sure the phone is off.
  2. Press and hold the Volume Down key.
  3. Turn the phone on by pressing the Power key until the phone vibrates, then release Power.
  4. Continue holding the Volume Down key.
  5. Release the Volume Down button when the black screen with red and blue lines of text appears.
  6. Press the Volume Down button repeatedly until reboot to bootloader is highlighted, then select it with the Power button.
  7. The device will display a white screen with colored text.
  8. Press the Volume Down button repeatedly until BOOT TO RECOVERY MODE is highlighted, then select it with the Power button. The screen will display the white HTC screen, and then turn black. After several seconds, another black screen with yellow and blue text will appear.
  9. Press the Volume Down button repeatedly until wipe data/factory reset is highlighted, then select it with the Power button.
  10. Press the Volume Down button repeatedly until Yes – delete all user data is highlighted, then select it with the Power button.
  11. Once the data wipe is complete, make sure reboot system now is selected and press the Power button.

I hope that this troubleshooting guide have helped you somehow. If you have other issues you want to share with us, feel free to contact us anytime or leave a comment below.

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