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Galaxy S7 Edge “dm-verity verification failed” error, downloads emails intermittently, other issues

As promised, here’s another collection of #GalaxyS7 issues for this week. This post brings you 6 more issues taken from reports we received during the last few days. Don’t forget to visit our main Galaxy S7 troubleshooting page if you can’t find a solution in this material.

Here are the specific topics we cover for you today:

  1. Rooted Galaxy S7 can’t access recovery menu
  2. Rooted Galaxy S7 Edge has apps stopping, crashing | Galaxy S7 Edge “dm-verity verification failed” error
  3. Galaxy S7 does not automatically connect to 4G network after being disconnected for some time
  4. Galaxy S7 Edge only works on wifi | Galaxy S7 Edge “network not available” error
  5. Galaxy S7 email syncing issue | Galaxy S7 downloads emails intermittently
  6. Galaxy S7 screen remain black even if there are incoming notifications

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: Rooted Galaxy S7 can’t access recovery menu

Product Name: SM-G930A. I am unable to get into recovery mode to wipe the cache and do a factory reset.  By pressing the key combination (Home + VolUp + Power), I am able to trigger the message “Recovery Boot….”, however right after that instead of going into Recovery Mode it immediately restarts back to the splash screen and loops. I don’t even need to hold the key combination to have it display the “Recovery Boot….” message.  Buttons do not appear to be stuck. I can get into download mode. I have tried using Odin to reflash the ROM using the rom I used before. However, this doesn’t change the experience I described above. I have let the phone die out completely and powered on to the same experience. I am unable to remove the battery on this Galaxy S7. The phone is rooted. I did have on Xprivacy and Xposed. I was also working with SetCPU and other apps to improve the speed the night before. I was under the impression though that I can always wipe the whole thing clean and start again. Please help. — Vance

Solution: Hi Vance. Our blog does not support issues due to rooting and official software modifications. Your issue may be caused by a specific glitch of a third party software running in your phone. Unmodified or unrooted Galaxy S7s don’t have problems accessing stock recovery menu so your problem must be a result of the hacks you’ve done. Try asking support from the developers of the software you’re using, or the community that helps develop them.

Problem #2: Rooted Galaxy S7 Edge has apps stopping, crashing | Galaxy S7 Edge “dm-verity verification failed” error

Hey there! My problem is big i guess and i have to tell in detail… sorry for that. I purchased a S7 Edge from T-Mobile SM-G935T from USA and came back to India.. it was locked so i went to a local vendor here in India to get my phone SIM unlocked and that stupid fellow did something to my phone without informing me. Since then my phone startup screen is showing a custom symbol with lock opening image. I somehow found that he tried to root my device and when i checked my system status is custom but my Knox counter is 0x1 and also found that restoring the stock firmware will solve it.. But someone told me that it may be possible that i will lose my IMEI number while restoring.

so first question is, is it possible?

Now since then i am getting phone related errors like “Google Play Store has stopped,” “phone has stopped,” “Facebook has stopped,” and many more related to each and every app installed. And after that i am not able to use any app and not even phone to call. then i have to wipe data using phone recovery and this kind of errors happen frequently.. and every time i have to wipe the data.

So what is the reason of this problem and yeah when i get into recovery the bottom of my screen is showing “dm-verity verification failed” but dont show check drk… i can restart my phone and use it.. i know when dm verity failed and check drk show you cant do anything on your phone when you start your phone it directly goes into recovery.. but that’s not the case.. so what may be the reason of dm verity verifiaction failed… and what is the solution of my all the problem. Please help me buddy as i am having a brand new phone. — Prashant

Solution: Hi Prashant. First of all, we want to make it clear that once Knox has been tripped or tampered with, just like in your case, there’s no way bring back its previous state. That means that even if you can unroot the phone and flash stock firmware to it, Knox will no longer work as expected. There’s just nothing that you can do about it.

Now, the answer to the rest of your questions is by unrooting the phone first, then flashing a stock firmware next. The best person that can help you do that (if you haven’t tried rooting or flashing before), is the same fellow that rooted it. There are a number of rooting software in the wild and while unrooting process is generally similar, there may be some specific hacks that needs to be done on your device first. And the only person that knows that is of course the guy who rooted it. In general though, flashing a stock firmware to a rooted device will automatically remove the root so try that first. As long as the flashing is done properly and you use the correct firmware for your phone model, all software settings should go back to their factory state, which means everything T-Mobile should be re-installed. Don’t worry about the IMEI, it should remain the same as long as you do the correct flashing process.

If you’ll encounter problems like apps crashing or not responding right after flashing though, that’s a totally different story. It may mean that you either used an incorrect firmware (which can potentially brick the phone), or that  the phone has deeper software issues.

Verity is an Android security feature meant to assure a user that the device official software has not been modified or corrupted. The “dm-verity verification failed” line means that your phone is telling you modifications have been made to the system partition. This is a normal message you’ll be getting if you root your phone. Once you flash a stock firmware, it should go away.

Problem #3: Galaxy S7 does not automatically connect to 4G network after being disconnected for some time

Galaxy S7 on Verizon Wireless. I recently started working in an underground location where I don’t receive a 4G LTE signal and only rarely receive a 3G signal. There is a wi-fi network. When I return to “the surface,” my phone does not connect to any mobile network during my drive home. When i get home, my phone connects to my home wi-fi and that seems to “wake up” something. I then receive a normal 4G signal and all of my queued incoming and outgoing texts go in/out. If I toggle Airplane Mode (before I get connected to my home wi-fi), my 4G comes back. Or if i try to call out, the first call fails with no network then my 4G reception returns and then my second call works. Everything works correctly until I go “underground” again. Something in the automatic switching seems to get hung-up. I haven’t done a factory reset yet but i would if i knew what I would lose. Would i just lose the apps i installed or would I lose any of the native VZW stuff. — Steve

Solution: Hi Steve. Hi Steve. We don’t think you need to try factory reset on this one as most of the time, a simple phone restart will suffice. Automatic switching mechanism on many Android devices tend to experience a similar problem to yours so it may be a minor bug that hasn’t been addressed all along. In many cases though, restarting the phone should keep everything running again.

If you really want to do a factory reset, go ahead. The process will delete all user data stored in the phone’s internal memory (but not the SD card) such as photos, videos, files, music, and contacts so make sure that you back everything up before you proceed. If you have a computer, you can install Samsung Smart Switch to it. Once you have the app installed on your computer, connect the phone to it via USB cable. Smart Switch will create a copy of everything in your phone (including files in your SD card if you want) so it’s an efficient way to create a backup. After you factory reset your phone, you can simply restore everything you saved in the Smart Switch app back to your phone.

Before you factory reset your device, make sure that you remember your Google account credentials to prevent Factory Reset Protection (FRP) from giving you headaches. FRP is a security feature that blocks unauthorized factory reset on a phone. As long as you remember your Google account username and password though, you should be good. Your Google account can be the Gmail account you used when you first log in to your phone, or another email from different email providers.

For reference, below are the steps on how to factory reset your S7:

  • Turn off your Samsung Galaxy S7.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  • Once highlighted, you may press the Power key to select it.
  • Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  • Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  • The phone will now reboot longer than usual.

Problem #4: Galaxy S7 Edge only works on wifi | Galaxy S7 Edge “network not available” error

My Samsung S7 Edge is not working unless it is on WiFi. Otherwise, 80 percent of the time, I get a message saying “Network Not available” when it attempts to send a text, makes a call, or uses internet. I get phone calls stating that they have been calling several times and after 2 rings it goes to voicemail. It was determined to be a warranty issue and T-Mobile was going to replace it but I had a small crack on the phone so they told me that I will be responsible for the full price of the phone and they can’t give me the warranty phone due to damage. This is so frustrating because the small crack happened about 9 or 10 months before this damage started. I do hope you can help. Please. — Belinda

Solution: Hi Belinda. Frankly, there’s nothing much that we can do to help you. If your carrier has determined that the reason for your text, call, and internet issues is due to a bad phone, (probably due to damaged antenna), then you must follow it. If you want a permanent fix, you will find a way to get a new phone. We can’t obviously help you with the physical damage on your phone so, again, you either have to invest in a new phone, or leave the issue as it is.

Problem #5: Galaxy S7 email syncing issue | Galaxy S7 downloads emails intermittently

I don’t know my Android version so clicked on Marshmallow. The issue I have is my phone won’t download the content of emails. I click on load more and it tries to download the info. Sometimes a day or so later an occasional email will come through (and the file sizes aren’t large) and other times I won’t receive it all, but I can download it from my computer. I’ve done numerous resets but don’t want to do a full factory reset. I’ve tried safe mode, deleting emails, online help with my provider and they’ve told me to contact Samsung. I’m in New Zealand — Jenny

Solution: Hi Jenny. If you’ve already contacted your email service provider as well as Samsung, why are you still holding on to the idea that there may be other solutions other than factory reset? In fact, factory reset should be one of the first things that you must do prior to seeking help from Samsung or your email provider. If your email provider is 100% sure that there’s no synching-related problem on their end, then factory reset may very well help you.

Factory reset will not only eliminate possible software bug that causes email sync function on your phone but will also restore all software settings back to their known, working state. If the issue is operating system related, restoring all defaults should get rid of it.

You can also try using another app to see if the problem is due to a buggy email app you’re using. There are many free, third party email apps in the Play Store. Try to use a few of them to see the difference.

Problem #6: Galaxy S7 screen remain black even if there are incoming notifications

Sir, i got a serious problem. i think it’s because about a week ago my phone suddenly had a black screen. I searched websites and i got a solution by pressing the volume down and power key. It worked…it worked 3 times but now that the solution is not working. I have tried that but it ain’t working. Phone just restarts with black screen and flashing blue light. Every thing is working except black screen but phone sounds when messages and calls come. if anybody have solution please share with me. i’ll be very thankful. — Rizwan

Solution: Hi Rizwan. If the phone continues to receive SMS and app notifications but the screen remains black, that’s a clear sign that the screen is not working properly. This means that the screen may have been physically damaged. If you accidentally dropped the phone or exposed it to water or heat before (and you chose not to let us know about it), then stop looking for software solutions. There’s no one who can give you hacks to fix the problem. You must bring the phone to a repair center so the screen can be replaced.

However, if the phone was never dropped, nor saw water before, a glitch in the operating system level may be to blame. To check, try booting the phone to different modes. Each of these modes (except safe mode) work independent of the operating system so if your screen works fine, that’s a confirmation of our hunch. Below are the steps on how to boot to different modes:

Boot in Recovery mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  • You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  • Wait until the Download screen appears.
  • If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.
  • Use Google to look for a guide on how to do it.

Boot in safe mode:

  • Charge the phone for at least 30 minutes.
  • Press and hold the Power button.
  • Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  • Continue holding the button until the phone finishes rebooting.
  • Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  • The only difference of safe mode from normal mode is that the former prevents third party apps from running. If you can boot the phone in safe mode but not in normal mode, uninstall all apps until the issue (that prevents you from booting normally) is eliminated.

Remember, if the screen remains black or unresponsive after trying all the different hardware button combinations above, you can assume that a hardware issue is responsible. Contact Samsung to have the screen fixed or replaced.

 


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