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Galaxy S6 keeps rebooting on its own after installing system updates, other issues

Our post today tries to spend significant article space on a seemingly becoming common issue about some Galaxy S6 units randomly rebooting after installing system updates. Frankly, solutions to this issue is very limited so we hope that our suggestions can help mentioned users find a permanent solution. Of course, this article also discusses some other issues sent our way. Don’t forget to visit our main Galaxy S6 troubleshooting page should you not find anything interesting in this material.

Below are the specific topics we discuss in this post:

  1. Galaxy S6 randomly rebooting | Galaxy S6 stuck in Samsung logo screen
  2. Galaxy S6 stuck in boot loop after an update
  3. Galaxy S6 gets SMS notification but can’t see the message | Galaxy S6 Viber not working properly | Galaxy S6 photos disappear after taking them
  4. Galaxy S6 draining battery even while charging
  5. Galaxy S6 keeps rebooting on its own after installing system updates
  6. Home router kicks out other devices if Galaxy S6 is connected | Wifi not working properly when Galaxy S6 is connected

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page, or you can install our free app from Google Play Store.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.


Problem #1: Galaxy S6 randomly rebooting | Galaxy S6 stuck in Samsung logo screen

My Galaxy S6 randomly restarted this morning, which it has done in the past, so i went to do a routine cache wipe (volume up + power + home), but the screen is frozen on the black and white “Samsung Galaxy S6 screen.” So i volume down + power, get to the menu and try to reboot, still end up frozen on the samsung screen. so i try to boot into safe mod using volume down + power, still end up frozen on the samsung screen, so i try to reboot from odin mode, and it is still ending up frozen on the samsung screen. finally a try a factory reset, and it STILL ends up frozen on the samsung screen. occasionally during this process i notice that all my other buttons seems to be functioning, i hit volume down and it beeps or i hit the back button and it vibrates, but the screen has only shown the following things: Samsung Galaxy S6 screen, the maintenance boot mode, and odin mode screens. it WILL NOT boot into recovery and if it does finally move past the Samsung screen, it just get a black screen. HELP! — Sara

Solution: Hi Sara. The aim of booting the phone to alternate modes (safe mode, recovery mode, download/Odin mode) is to see if the device can restart to different software environments to allow further software troubleshooting. If your S6 can’t get past the Samsung logo screen regardless of a boot mode attempt, that means that you can’t fix the issue on your level. We believe that we always make it a point in all our tutorials that if all software troubleshooting has been done, including all boot mode attempts, repair should be next. That said, we suggest that you submit the phone to a thorough hardware check by Samsung so they can diagnose the problem. Unless you are trained how to repair Samsung devices, there’s really no point to continue trying to find a software solution for your issue. If the phone continues to freeze when you boot to Odin, you won’t be able to do a more drastic potential solution of flashing stock firmware.

Problem #2: Galaxy S6 stuck in boot loop after an update

Dear Support Team, please note that I am facing this issue since 1.5 months, after updating to official Samsung firmware. My phone automatically downloaded the update and install the update in October 2016. After that my phone turns itself off and keeps rebooting. Rebooting Types: 1. Reboot properly come upon Home Screen, when I try to unlock homescreen It goes again, hang first then reboot. 2. While rebooting itself, it gets stuck on Samsung S6 Edge and Andriod Logo. 3. While rebooting itself Samsung logo came and again screen off and reboot. Note: In all rebooting case my SM-G925F Vietnam Country’s Phone shows up. LED Light blinks white color, sometimes white light blinks like on…off…on…off, and some time white LED Notification Light Keep on. In this way I tried multiple times pressing 3 buttons (V-Up+V-Down+Power) Same time it get off from stuck and white led off and Phone Starts Properly. and Sometime I try to go Recovery Mood by pressing (V-up+Home+Power) buttons, and try to Reboot to bootloader, then my phone comes alive properly. I tried to root successfully one time also, and tried also Install Stock Firmware from Samsung-firmware latest one also. and I am unable to install any other old update of Marshmallow because my Phone says B:4 K:2 CheckFail. Please help me. — Ali

Solution: Hi Ali. Usual problems that show up after an update are fixed by either wiping the cache partition or doing a factory reset. In most cases, Samsung phones tend to get back to working order after a factory reset. Boot-related problems like the one you’re experiencing can happen if you install an official firmware to a rooted phone, or when the device runs custom firmware during the update. We are yet to encounter boot-related problems after an update when a phone is running stock firmware. Forcing an update to a rooted phone can sometimes corrupt the bootloader, resulting to a situation you’re describing here. Unfortunately, most such cases don’t end well. Most of the time, the damage to the bootloader can become permanent, which also means that the phone has effectively become unusable.

Just like what we tell Sara above, since you’ve already done everything on your end to fix the issue, the best thing that you can do right now is to ask help from Samsung. If the phone’s warranty is still up at this time, repair or replacement may be free. Otherwise, you will have to shoulder all the repair or replacement cost.

Problem #3: Galaxy S6 gets SMS notification but can’t see the message | Galaxy S6 Viber not working properly | Galaxy S6 photos disappear after taking them

  1. When I get a SMS, I get the notification. I see it when I don’t enter the chat but when I click on someone’s name and enter the chat, there is no any message. The same happens when I send the SMS; they get it but it is not shown in the chat.
  2. Viber, the most used contacts chats are erased and when I search for them I see received message. if I don’t, I don’t know who send the message and I can’t open it at all.
  3. When I take a picture, it gets lost. I can’t find it any more in Camera folder or any other. When I take a picture and click on it while still in camera app, and when I go back I see pictures which I took when I just got the phone. Help please. — Aleksandra

Solution: Hi Aleksandra. All these problems may have the same one cause so the solutions we will be suggesting are general in nature. Below are the things that you can try.

Wipe the cache partition

The first potential solution that you want to do here is to make sure that the phone uses an updated system cache. This is done by deleting the cache partition contents, forcing the device to build a new cache afterwards. Updates and app installations can sometimes corrupt the system cache so it’s always good to keep it updated. There’s a chance that a bad system cache is causing some apps to behave erratically. Here are the steps on how to refresh it:

  • Turn off the device.
  • Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  • When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  • When the Android System Recovery screen appears, release the Volume Up and Home keys.
  • Press the Volume Down key to highlight ‘wipe cache partition.’
  • Press the Power key to select.
  • When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.
  • Observe the phone for a few hours to see if the issue is gone.

Delete app cache and data

This is the only solution that targets individual apps involved in the issue. Make sure that you only wipe the cache and data of the app with the problem. For example, if you’re using the stock Samsung messaging app, there’s no point wiping the cache and data of other messaging app you may have. In other words, you want to make sure that you do this procedure on relevant apps only. Below are the steps on how to do this solution:

  • Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  • Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6.0.
  • Once in there, click on an application.
  • You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  • You should now clearly see the Clear Data and Clear Cache buttons for the application.
  • Observe the phone for a few hours to see if the issue is gone.

Change system time and date

In some rare cases, incorrect system date, time, and timezone can confuse sorting of SMS messages. Make sure that the phone is using the correct time and date by doing the steps below:

  • Open Settings app.
  • Scroll down to Date and time and tap it.
  • Enable Automatic date and time.

Restart the phone to safe mode

If you’ve made it this far, the problem is most likely due to  third party app. Keep in mind that some third party apps can create a conflict with the operating system or some other apps, causing them to behave erratically. If you are fond of installing apps without reviewing them for potential bugs, there’s a chance that one of them may be the cause of the problem. Booting the phone to diagnostic or safe mode should help you check this possibility. While safe mode is on, all third party apps and services will be blocked. This means that if the issue won’t happen, that’s a confirmation of our hunch. An important thing that you want to do right after booting to safe mode is observation. Make sure that you let the phone run in safe mode for at least 24 hours so you’ll have more than enough time to see the difference. Below are the steps on how to boot your S6 to safe mode:

  • Turn the phone off.
  • Press and hold the Volume Down and Power keys for 20 to 30 seconds.
  • Once you see the Samsung logo, release the Power key immediately but continue pressing the Volume Down key.
  • Your phone should continue booting up and you will be prompted to unlock your phone as usual.
  • You will know if the phone successfully booted in safe mode if the text “Safe mode” is displayed at the lower-left corner of the screen.
  • Observe how the phone for a minimum of 24 hours.

Remember, safe mode won’t help you identify the particular problematic app. You must do trial and error identification to figure it out. That means uninstalling third party apps individually and observing how the phone works after every uninstallation.

If the issues remain even when the phone is in safe mode, proceed to the next step.

Factory reset your device

This is the ultimate software fix that you can do in most cases. Make sure that you create a backup of your important files before you do this step. If you haven’t tried it before, here’s how it’s done:

  • Turn off your Samsung Galaxy S6 Edge.
  • Press and hold the Volume Up, Home and Power keys together.
  • When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  • Wait until the Android Recovery Screen appears after about 30 seconds.
  • Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  • Press the Volume Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  • After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Problem #4: Galaxy S6 draining battery even while charging

Hi, my phone has a hard time charging. It’s a 2-year old, and at first I thought it was a prong that was bent, preventing a good charge from the plug in chargers. I’ve tried charging it on the wireless pads and still, it takes forever to get any charge. I’m worried it might be the battery and of course these ones don’t just swap out easily. I’ve done a factory reset hoping that would help and it’s still the same issue. It will charge, but it takes forever and it drains super quick. I have no insurance on it, it’s an unlocked phone that I use Straight Talk with. I love it and would like to continue using it. Any suggestions? — Crystal

Solution: Hi Crystal. Lithium-ion batteries like the one in your phone doesn’t get better with age. On the contrary, a battery of this type starts to degrade once it leaves the factory (even when the phone hasn’t been unboxed yet). The more it’s being used, the faster its performance degradation becomes. In some cases, users can start noticing how the battery life gets shorter only months after unboxing a brand new device. If you’ve been a heavy user all these time for the past 2 years, there’s high likelihood that the battery may have simply lost significant capacity, meaning it can no longer hold as much charge as it did before. This may be normal depending on your usage habit for 2 years. That factory reset did not improve the situation is another indicator that there may be no software issue involved here. The battery may have simply reached its end-of-life at this time. Obviously, you can’t fix the battery itself but you can try to change some of your usage habits to remedy the situation. Some of the things that you can try includes the following:

  • lowering screen brightness to lowest comfortable setting you can tolerate,
  • using Power Saving Mode or Ultra Power Saving Mode,
  • using black screen screensavers or wallpapers,
  • turning off live wallpapers or unnecessary widgets,
  • turning off unnecessary wireless services (when you’re not using them) such as Bluetooth, NFC (near field communication), wifi, mobile data,
  • disabling master sync or making sure that apps don’t automatically sync (you will have to manually check each app settings for this),
  • updating apps (some updates may include tweaks that can help save battery power consumption)

Of course, if you want a more permanent “fix,” the best thing that you can do right now is to send the phone to Samsung so you can request for a battery replacement.

Problem #5: Galaxy S6 keeps rebooting on its own after installing system updates

Hello. Well my first set of issues started after installing the system updates. It wouldn’t allow me to access my VM as easy as it did before, and also my phone just started to get slower, getting hot, shutting off by itself, kinda functioning as if a bug or virus was interrupting it. I then search the net for some solutions and many people had the very same issues. So as I read that several people suggested uninstalling the updates, which I tried, and found that it didn’t help much.

After about a week or so my phone started to just shut off and a large Android popped up saying “DO NOT TURN OFF” with message on the left hand side stating that the phone has not booted as normal and some other stuff, that I have no idea what it meant. However, some words were in red and some blue and white. So I let it stay like that for about 3 hours and no change; it was just stuck like that.

Well this had been going on a few weeks until yesterday, when the prompt popped up for a system updated yet again. Now as desperate as I was and super annoyed about this phone that I paid so much money on is malfunctioning and I have had any hard drops or any water on it before. Anyhow, without thinking, I clicked for the installation and restart praying it may help… (sigh, I moved too damn quick). Once it shut down a small little Android popped up and under it says ” installing system updates.” Well, it was “updating” in just a few minutes up to 100%, then it turned off and never came back on for 6 or 7 hours.

I also been doing the hold Power+Volume down key+front key at the same time and all that does is shut it down and again never comes back on. Uugghhhhhh. I’m going nuts and I’m without a phone. I have two little girls age 7 and under, so having no phone in case of emergency or their school and doctors appointment, etc., is just scary for a single mom who certainly can’t afford another phone for over 800$ again any freaking time soon. Please I pray that you can help me out. Thanks a million, blessings to you.  #MyStruggleIsReal. Sincerely. — Tyisha

Solution: Hi Tyisha. If you haven’t tried doing a factory reset before (via recovery mode by pressing Volume Up, Home, and Power buttons), we suggest that you try that. If that won’t work either, your case may be similar to what Sara and Ali are experiencing above. As much as we would like to help you, there’s really nothing much that we can tell you to fix this problem on your end. Flashing stock firmware is obviously out of the question as Odin mode (by pressing

Power+Volume down key+front key) is inaccessible. If factory reset won’t change anything, your only solution for this problem is by getting a new phone.

To prevent this problem from happening in the future, you also want to let your wireless carrier know (assuming that you received the system updates from them via over-the-air) about the problem so they can tally cases like these. This may not offer immediate solution but it is generally still helpful in the long run. If you received system updates from any  other means other than over-the-air, make sure to let the developer of the software know about the situation as well. The same is true if you tried to update Android by using custom software.

Problem #6: Home router kicks out other devices if Galaxy S6 is connected | Wifi not working properly when Galaxy S6 is connected

Hi. I’m having a problem with my Samsung Galaxy S6. It has only started in the last day or so, and it relates to my home wifi. When I connect my phone to the wifi, every thing else that is connected to it stops working — laptop and TV. When I disconnect it everything else is fine. Have checked router and restarted it, all signals and lights are working fine until I link my phone to it! I have had the phone just a year this month and not had this problem until now. Can you help? — Karen

Solution: Hi Karen. We can’t see any reason why a Galaxy S6 can control your router’s function and prevent other devices from connecting all of a sudden. The problem must lie with the router and not on the phone. There may be a bug on the router’s firmware that cuts off devices when a particular device connects to it. To check, try connecting to other wifi networks to see if the same scenario happens.

If you want to fix the problem on your own home wifi, consider doing a router factory reset. If you don’t know how to do that, contact the router maker or ask assistance from your internet service provider (if they supplied the router).

 


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