Solution to Galaxy S6 freezing issue after Marshmallow update, other issues

We give today another batch of #GalaxyS6 issues. As usual, these cases are taken from the emails of our readers asking for help. One of the topics in this article is on how to fix the S6 freezing issue after Marshmallow update, which also happened to previous iterations of Galaxy S phones in the past.


Below are the complete issues covered here today:

  1. Galaxy S6 always losing cellular network connectivity
  2. Solution to Galaxy S6 freezing issue after Marshmallow update
  3. Galaxy S6 Edge not charging anymore | Galaxy S6 Edge won’t boot up
  4. Galaxy S6 can’t turn off Ultra Power Saving Mode (UPSM)
  5. Galaxy S6 problems after Marshmallow update | Galaxy S6 screen lock not working after Android update

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 always losing cellular network connectivity

I have a very weird problem with my 3G connection.

My SIM card works on my other cheap Huawei, but my brand new S6 Edge seems to have problems connecting.

Every so often I can’t call, use the 3G to browse the internet or receive texts. Sometimes my 3G is very slow (E). I’ve tried doing a factory reset and I’ve fiddled with all the mobile network settings. Nothing seems to be working. At least I can use the 3G sometimes, but it’s only like 2 minutes before it starts dropping again. The weird thing is that it still shows the “adidas logo” but only when there’s an H or E I can use my 3G and phone-application. My own provider isn’t helping for shit, got any ideas? — Bas

Solution: Hi Bas. If factory reset did not do anything to restore the default network behavior and settings, nothing will. Call Samsung or your carrier and ask for a replacement phone.

Problem #2: Solution to Galaxy S6 freezing issue after Marshmallow update

Dear the DROID guy. Since the new update to Marshmallow 6.0.1 that i installed about 2 weeks ago, my Samsung Galaxy S6 Edge has been freezing which results into an auto shut down/restart. this happens at least once everyday without fail.

It would at first just freeze but after some times, a line with colors in it (like a messy straight line horizontally across my phone that is very thin and some what resembles a TV without signal) appears during the freezing. there was also once where my speaker emitted a loud sound, like a scratch of cardboard against one another for a split second and immediately it would shut down.

At some times, it would shut down and just by holding the power button, it would not turn on. So, i’d force start the phone by pressing the home button + power button + volume up &down button.

This usually works.

But there are times where the above method would not work and I would have to hold the power + home + volume down buttons leading to a screen that says to download mod and asks for me to restart phone/download mod version. I would then choose to restart phone normally.

Just today (12th July) My phone has suddenly shut down while in the Waze app. and I have tried the above methods multiple times. Even charging my phone but as I charge my phone, it does not even detect it to be charging. And it remains unresponsive.

I take very good care of the phone. What should I do?

Also, will it be helpful to send you a bug report of my phone?

It would usually crash in Snapchat, Facebook and the Chinese game “sword and magic.”

Thank you! — Ann

Solution: Hi Ann. If you’re positive that the issues you’re experiencing right now started after you’ve installed Android Marshmallow, the same set of software troubleshooting we’ve been providing should work.

The first thing that you should try is wiping of the cache partition. If your S6 suffers from chronic slow performance issues, fast battery drain, or overheating, it’s always a good idea to perform a system wide cache wipe. Aside from storing caches for individual apps, your S6 also creates a system cache to quicken things up for the entire system. That cache for the entire system is stored in the cache partition and sometimes, deleting it can be an effective means to bring the S6 back to its working order. Here are the steps how to do it:

  • Turn the device off.
  • Press and hold the Power, Volume Up and Home buttons simultaneously.
  • When the phone vibrates, release the Power button but continue to press and hold the Volume Up and Home buttons.
  • Now, when Android recovery screen appears, highlight the wipe cache partition option using Volume Down button.
  • To confirm the selection, press the Power button.
  • Wait for a while until wiping the cache partition is finished.
  • Now, “Reboot System now” will appear on the screen. To highlight the option use the Volume Up/Down key.
  • Press the power button to confirm it, and your device will automatically reboot.

Another good thing to try is observe the phone for a few days while safe mode is enabled. Also known as Diagnostic Mode, booting up your S6 in safe mode can help you isolate whether a problem is being caused by the firmware or by a third party app or settings. It does this by simply preventing third party apps from running. While in safe mode, a user can uninstall an app normally and other phone functions continue to work like the background syncing, cellular data, SD card access, and camera. These are the steps on how to boot your phone in safe mode:

  • Turn off the phone completely.
  • Press and hold the Power/Lock key for a few seconds to turn on the device.
  • When Samsung logo appears, press and hold the Volume Down key until the lock screen shows up.
  • The word “Safe mode” should now show on the lower left corner of the screen indicating that your device is now in Safe Mode.
  • To boot back to normal mode later, simply restart the phone.

Remember, if the phone works fine while in safe mode, that’s a sign that one of your apps is causing the problems. This can be due to incompatibility with the new operating system, or that one of your apps is poorly coded. Make sure that you remove apps until the issue is eliminated.

If nothing works still, continue to factory reset.

Problem #3: Galaxy S6 Edge not charging anymore | Galaxy S6 Edge won’t boot up

Hello. I have had my S6 Edge since 1/8/2016. Never really had any issues with it. I always try to keep it updated, but ignored a recent “Samsung” update (might be related, might not-I’m not that savvy at this), but only for about 20 minutes. On 7/11/16 at night time, I was done browsing and closed out all the apps I used. I went to go open an app and my phone rebooted itself. Since this has happened in the past before, I didn’t think anything of it…until it stayed on the reboot screen for a verrrrrry long time with every color indicator light on. My phone started to heat up, so hot, it was difficult to hold.

In an effort to turn it off, I pressed the power keys as well as the volume buttons and the screen turned off and the phone cooled. After this, the indicator light remained on (in red this time) and I let the phone die. I did try to turn it on a couple times, but the same description as above would reoccur.

I tried to charge it since it was at 35% when it rebooted, but it would get really hot.

The next day, I plugged it in to charge and the battery indicator appeared on the screen, but wouldn’t charge. Now to today; the phone will not turn on at all. I read through your troubleshooting guide and tried several of the methods for safe mode, plugging into PC, etc, but my phone just refuses to respond. I haven’t dropped the device or come into contact with any liquids. It literally happened out of the blue. — Carol

Solution: Hi Carol. Unfortunate as it may sound but there’s really nothing much that we can do to help you in this situation. Your phone needs to be checked physically by a professional so proper diagnosis can be done. The possible causes in this case range from a bootloader issue, a firmware glitch, to hardware malfunction. The battery may have failed as well, resulting to the failure of the phone to charge. In some cases, a bad charging port can also show similar symptoms so there’s just no way for us to know what the real issue is. If the phone is still covered by a warranty, the repair or replacement order should be free. Otherwise, you’ll really have to invest more dollars to resolve the problem.

Problem #4: Galaxy S6 can’t turn off Ultra Power Saving Mode (UPSM)

First off all I would like to say that I’m not using TouchWiz. I’m using the Google version instead. But anyways the other day I was running out of battery life on my phone so I turned on Ultra Power Saving Mode. When I turned it on my phone asked me if I would like to launch the Touch wiz version or the Google version and I choose the Google one. then my screen turned black and white (which I expected) and then all of the apps started disappearing except for the important ones like phone, messages, settings and stuff like that. When my phone eventually ran out of battery I came home to charge it. I tried for a bit to get it out off UPSM but I could not do it. I have tried everything that you guys wrote in your article about the s6: . the only problem I could not test was the safe restart because from what I have understood that is not possible on the galaxy s6 edge. I really don’t want to do the factory reset so please help?Andreas

Solution: Hi Andreas. The problem of being stuck in ultra power saving mode is not new. It’s a known bug even in previous Galaxy S series although we are yet to hear a fix from Samsung about it. The only remedy that we know if a Galaxy phone is stuck to UPSM is the one mentioned in this link. If such remedy doesn’t work in your device, you are left with factory reset as the only choice. Here’s how to do it:

  • 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 #5: Galaxy S6 problems after Marshmallow update | Galaxy S6 screen lock not working after Android update

Since I updated to Marshmallow from Lollipop my phone has had nothing but problems! I REALLY don’t want to perform a factory reset…but I’ve tried everything else!

The latest issue that popped up is the screen flickering when the screen is trying to automatically turn off/lock after a set time. So I disabled the screen lock feature by setting it to none. Now after turning the phone on, once I turn the screen off by pressing the power button once (to save battery now that it doesn’t auto lock & turn off) the screen won’t come back on!! When a call comes in I can see the menu icon & back icon at the bottom corners of the phone light up…but the screen stays black. If I keep pressing the power button then the home button several times it flashes then finally comes on. But that doesn’t help me see to answer calls. If I swipe over the general are where the answer / rejects icons would be, I can answer the call. But as I said the screen stays black.

The only option is to leave the screen on all the time!…because once it’s off it won’t come on by itself unless I reboot.

Because the screen isn’t working correctly, I can’t restart it in safe mode or recovery mode because I can’t tell when the screen comes on so I can release the power button & I can’t see how to scroll down in the recovery menu to choose an option!!

Is there a way to perform a cache partition wipe and start in safe mode if I connect via USB to my laptop? I’d like to run it in safe mode to disable all 3rd party apps to see if that fixes it or not before I’m forced to do a factory reset.  🙁

Will a factory reset even help?

Thanks for your time. I appreciate your help. 🙂 — Tammie

Solution: Hi Tammie. There’s no other way to clear the cache partition. You must boot to recovery mode first to access the said option. That means your only way out of this situation is by doing a factory reset via Settings.

If factory reset won’t resolve the issue, it means that either the newly installed firmware  (operating system) is buggy, or that you’ve installed a problematic application. It’s important that you observe how your phone works for at least 24 hours after doing a factory reset. Be sure not to install any app during this period so you’ll know if you have an incompatible third party application.


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One Reply to “Solution to Galaxy S6 freezing issue after Marshmallow update, other issues”

  1. Hi i want to discuss a problem.My Galaxy S6 edge is working fine but yesterday it keeps freezing after some minutes of use and then restarting automatically..I wipe out Cache partition but it didnt work,I Factory reset the phone but it didnt work too.I am running Android 6.0 Marshmallow in it.Kindly tell me whether its the Firmware issue ,means i may upgrade my phone to 7.0 Nougat to solve the problem or it may be another issue.?your helpbin this regard is really helpful.

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