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Galaxy S7 battery drain issue after installing AT&T Nougat update, other issues

Welcome to another article about Samsung’s #GalaxyS7 and #GalaxyS7edge devices. As usual, we will be answering some of the issues sent our way for the past few days. We hope that the solutions in this post will help not only those mentioned here but others with similar problems as well.

Below are the specific topics we’re covering today:

  1. Galaxy S7 can’t upload photos and videos in one conversation thread
  2. Galaxy S7 network service not working properly in some locations
  3. Galaxy S7 screen remains black but continues to ring or vibrate when rebooted
  4. Galaxy S7 battery drain issue after installing AT&T Nougat update | How to change icons while in Maximum Power Saving Mode
  5. Galaxy S7 edge Verizon Messaging app not showing envelop icon notifications when receiving messages
  6. Galaxy S7 screen is damaged after it was dropped accidentally
  7. Galaxy S7 audio not working
  8. Galaxy S7 edge unable to receive messaging using stock messaging app | Galaxy S7 edge not showing log of sent and received messages for certain contact
  9. Galaxy S7 stock calendar app not syncing with Facebook calendar
  10. Galaxy S7 won’t read mp3 files after an update, SD card corrupted after an 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 S7 can’t upload photos and videos in one conversation thread

Good Afternoon. Recently, may have been just after the firmware update received, there is one specific conversation thread that will no longer upload all of the previous message photos and videos. Conversation thread was started back in January 2016 until now, photos will only upload as of December 20th, 2016. Anything before this dates shows as continuously trying to load. I haven’t changed anything in the phone, SD card is the same since I purchased. I can’t understand why only this one contact will not load all previous photos and videos. I look forward to any insight and or enlightenment on my situation. Thank you. —  Douglas

Solution: Hi Douglas. There may be a bug causing this problem. There are hundreds of thousands, if not millions, of potential points of failure in a complicated software environment as Android so it’s hard to determine what specific coding issue is behind it.

Wipe the cache partition

To troubleshoot your problem, we recommend that the first thing you want to try is to wipe the cache partition. This may help in this case as this process will force the phone to create a new system cache. Installation of app and system updates can sometimes cause problems due to a corrupted system cache. Deleting the old one and replacing it may be the fix. Wiping the cache partition won’t erase your messages or any of your user files such as photos, videos, documents, etc. so it can be done safely. Here’s how to do it:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Delete the conversation thread

Should wiping the cache partition won’t fix the problem, you have no other option but to delete the conversation thread and see if it will help. There may be a bug associated with the said thread and creating a new one may clear it. Before you delete it, consider creating a backup of your messages to a computer or another device using Samsung Smart Switch app. This app can create a copy of your messages so you can restore them back to your S7 if you’ll be able to eliminate the bug.

Wipe the cache and data of messaging app

If deleting the conversation thread won’t work, the next step is to make sure that you deal with the messaging app you’re using. It’s possible that the bug is being caused by the app itself so you must restore it to its default settings. Be sure to back up your messages via Smart Switch before you do the steps below:

  1. Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  2. Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6.0.
  3. Once in there, click on an application.
  4. 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.
  5. You should now clearly see the Clear Data and Clear Cache buttons for the application.

Problem #2: Galaxy S7 network service not working properly in some locations

For several weeks now I have been dealing and service connections. My feeling is that my phones wireless signal is damaged but I’ll illustrate. There are times that I have great service and shitty service all in the same minute and in only particular locations that I go to. Anywhere else I have perfect reception and I haven’t worries. Any help you can give me?? I have had my SIM card changed, I have completed a factory reset, had my networks reset. And I am going to give my phone back to my local technician to send off to Samsung but I would desperately need some answers please. — Gareth

Solution: Hi Gareth. A network service problem that occurs only in one location is more of an indication of poor service or signal reception than a phone issue. If this issue is due to software or hardware error in your phone, it should happen regardless  where you are located.

Telling us that you network service issues without giving any specific details is not very helpful in identifying the problem. You must work with your carrier in solving this problem rather than with third party support teams like us. There’s nothing that we can do given how little information you provide here. We also don’t have the right tools to conduct some tests to see if there are any on-going service interruptions in the area you’re having problems in. This problem is the territory of your carrier so contact their technical support department for answers.

Problem #3: Galaxy S7 screen remains black but continues to ring or vibrate when rebooted

I have a blinking green light, and a black screen that will not turn on. Lower buttons light up, and phone rings/vibrates still. I have tried the reboot methods and after holding the volume and power buttons, after 10 seconds or so the phone will vibrate for a second, but not turn on.

Also the right side of the screen will light up for a second, with white lines, only the right 1/8th of the screen will do this though. Any ideas what this could be? Thanks. — Nathan

Solution: Hi Nathan. Was the phone accidentally dropped before noticing this problem? This problem is often caused by unnecessary shock on the screen assembly after a drop. In some cases, exposure to water or heat can also damage the screen which can manifest in a situation you’re describing here. If the phone suffered any physical damage at all, stop looking for software solutions. Obviously, you won’t be able to fix a hardware problem with any software “magic” trick. Just contact Samsung  so they can check the screen and do the necessary repair. If there’s no nearby Samsung service center you can run to, you have no other choice but to let an independent service center do the repair for you. Letting a third party repair your device will automatically void the Samsung warranty and Samsung may refuse to fix your S7 later if they’ll discover that someone has opened the device first. Only send your phone to a third party service center if you have absolutely no way of sending it to Samsung.

Problem #4: Galaxy S7 battery drain issue after installing AT&T Nougat update | How to change icons while in Maximum Power Saving Mode

My Galaxy S7 has never really had good battery life, but at least it lasted through out the day. In the last month, AT&T has pushed out the Android 7.0 and then an update and at 100 % charged, the phone tells me I have less than 9 hours of use.

My question is tri-fold. I have over 140 apps on my phone, they are all set to not run in the back ground. I have had them since I had my S3. Occasionally, adding a few new ones, could they be affecting the S7 7.0 performance?

Secondly, I have taken to setting my phone to maximum power saving mode and would like to switch out one of the eight icons allowed to a different one. How do I do that?

Lastly, what else can I do to correct this power drain as my S3 and S5 worked fine with these apps installed? I have already done a factory reset after the update and nothing changed. Thank you in advance for any help you can offer. — Faye

Solution: Hi Faye. There are a number of factors that can negatively impact battery performance in your Galaxy S7, with the most significant ones include the following:

  • the number of apps installed,
  • the number of apps and services running in the foreground and background,
  • display settings
  • connectivity functions remaining on most of the time

One of the most important considerations in extending battery life in a daily basis and battery performance in the long run is to limit the number of installed apps  to the minimum as much as possible. We know this doesn’t bid well for modern users but sadly, current smartphone battery technology hasn’t really improved much for the past 10 years so while the devices become faster and more powerful, the power source (Lithium-based battery) has significantly lagged behind. However, Samsung and other smartphone makers market their devices as amazingly fast and feature packed, there’s no doubt that the main weakness remains that battery. We don’t know how much longer you expect your S7’s battery to last but based in our experience with our own S7 (with bare minimum of less than 50 apps installed), 10 hours is the longest time in a day that we can use it before topping it off again. To answer your questions, continue reading.

Question #1. Like all Android versions, Nougat may or may not perform up to par due to a number of reasons. The vanilla operating system version released by Google is pretty decent and works satisfactorily with most flagship phones we’re used so far. Keep in mind though that the Android Nougat version is no longer the original Google  version but most probably a slightly modified one from your carrier. Poor or inefficient coding may be introduced in the firmware version running in your phone after installing updates or apps so the answer to your first is, it depends. In general though, Android Nougat is stable enough that it even works better than Marshmallow (based in our own experience). This may not be true in your case. Just bear in mind that the more apps you install, the higher the chance of possible points of failure there are. That said, it’s possible that apps may be hampering the performance of the operating system.

Question #2: While in Maximum Power Saving Mode, you will only be able to edit the four lower icons. The first four icons on top can’t be changed at all. To change the  second group of icons at the bottom, do the following steps:

  1. Run the phone in Maximum Power Saving Mode.
  2. Tap the options icon at the upper right hand side of the screen (the three-dot icon).
  3. Tap “Edit.”
  4. Tap the minus sign for each icon you want removed or changed.
  5. Tap the “+” sign inside the box where you want to add the new shortcut or icon.
  6. That’s it!

Question #3: Fast power drain issue can only be remedied and there’s no permanent fix for it in general. You must use your phone smartly, keeping in mind that whether you use it or not, its battery is draining power. Lithium-ion batteries like the one in your S7 gradually loses capacity to hold a charge the moment it left the factory. The rate of this capacity loss quickens the more you charge and discharge (use) the phone day in and day out, meaning you’ll eventually be charging it more often. The more apps you install, the more power the system needs to maintain them. There’s also the chance that some of the apps you have may not be coded properly, draining more battery power that they’re supposed to. If you can’t live the apps you’ve installed right now, then you simply have to focus in other aspects in minimizing battery consumption such as lowering screen brightness or turning off unnecessary network functions such as wifi and bluetooth whenver possible. If you’re looking for a permanent fix for a battery drain issue, we’re afraid there’s nothing available for you, unless of course there’s a particular case that causes it like a bad app or malware.

Problem #5: Galaxy S7 edge Verizon Messaging app not showing envelop icon notifications when receiving messages

I have a Galaxy S7 Edge which I updated last week. I use the Verizon Messaging App. Before the update I would receive an envelope on my lock screen that would indicate how many text messages had come through. Since the update the envelope no longer appears. I still receive the LED letting me know I have a new message, sounds still work etc., but I depend on the envelope. Under settings I no longer see where I can mark this app to allow messages on lock screen. I have tried a soft reset and everything else I can think of. How do I keep my envelopes back?        — Gingermeyers4

Solution: Hi Gingermeyers4. We’re assuming that you installed Android Nougat or one of its follow-up patches. If nothing changes when you set up Notifications under the Settings app (Settings>Notifications), you want do our suggestions for Douglas above. If the solutions we suggest for him will not work, the new update may have changed the behavior or the app or the operating system for this particular feature. This is a coding change and there’s nothing that we can do about that. Consider letting Verizon know of the issue so they can help you.

Problem #6: Galaxy S7 screen is damaged after it was dropped accidentally

Hi there! Dropped my phone last night. On the locked screen, where the date, time and battery life is displayed, there’s a constant green and white big bar that’s dropping down from the top non stop. It moves at a pretty quick rate (I counted over 60 repeats in less than a minute). Clicking the home button on the device brings a black screen. Using the side button to get to the unlock screen causes RAPID flashing and the entire display is completely out of order. I can see that there are duplicates of everything, as it’s constantly scrolling down. For instance, I have the weather on the front screen, and I can see where it normally is; top left. When I unlock, I can see the weather down where the first row of applications would be. It seems holding it a certain way will completely stop all of the flickering, scrolling and odd colors, but it’s hit or miss. I’m wondering if replacing the screen is needed, if it’s a lose wiring, OR if there’s a problem with the back light. It almost seems as if the phone still thinks I’m touching the screen and trying to predict where I’m going to swipe/click. But it’s completely erratic. — Heather

Solution: Hi Heather. The only way to know what causes the screen to behave erratically is open the phone and check the screen assembly. We are certain though that you have a damaged hardware but if you’re lucky and the shock from the drop did not damaged other components, a screen replacement may restore all normal workings of the device. Kindly contact Samsung and let them handle the screen replacement for you.

Problem #7: Galaxy S7 audio not working

Sounds is not working on my Samsung GALAXY S7. I’ve tried “Wipe Cache” from the reboot screen, factory reset, testing out sounds in safe mode, and none of these helped. I even took my phone to a Samsung Service center an hour away, only for them to tell me it’s not a hardware issue and it’s software, and then I need to factory reset again and download one app at a time. I’ve uninstalled a lot of apps and tried uninstalling one app at a time to see which is the problem. None of them have worked. I’ve also taken my phone to a Samsung specialist at Bestbuy and they did a hard reset and it didn’t help. Please help :(. — Yeeliau

Solution: Hi Yeeliau. The general rule in troubleshooting any Android problem is to always start with software troubleshooting first. If nothing will change after you’ve exhausted all software solutions, especially after a factory reset, you can assume that it’s a hardware problem. As far as troubleshooting this issue on your end is concerned, you’ve already done all of them at this point. Contact Samsung again and have them repair or replace the phone.

Problem #8: Galaxy S7 edge unable to receive messaging using stock messaging app | Galaxy S7 edge not showing log of sent and received messages for certain contact

Hi there. Using the stock message client, on S7 Edge, I am having an issue with a particular recipient. It doesn’t happen with anyone else. When I type a message to her and click send, the message is sent and received at her end. But it does not save or appear anywhere on my end. There is no history or log or record of any message being sent to her. I also can not receive messages from her. We have checked the obvious, that she has been blocked somehow, but all those settings appear to be normal. Really bizarre and frustrating. As I said – it doesn’t happen with anyone else in my contact list. Appreciate any help! — Rob

Solution: Hi Rob. Your issue may not be identical to Douglas’ above but the solutions are the same. Make sure to back up your messages before attempting to clear the cache and data of the messaging app.

You can also try to narrow down the causes by using a third party app to see if that will work. There are many free messaging apps in Google Play Store that you can use for this purpose. If you can send and receive messages normally for this contact on another app, you may need to reset all software settings to default via factory reset. Here’s how:

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

Problem #9: Galaxy S7 stock calendar app not syncing with Facebook calendar

Hi. I have an Samsung S7 and I am facing 2 issues. 1) It seems that my Facebook calendar cannot sync with Samsung calendar. When i go to settings/account, under Facebook there are no options. the same for contacts. Also, it seems the notification are not getting pushed to my phone, i have to access the app to see updates. 2) outlook calendar and email doesn’t sync. When i am trying to set up the EAS, i login in but then it doesn’t sync. When i click in the server settings and it tries to connect to the server it says cannot connect to server, so nothing gets synced.

I also have the Outlook app and that works fine but the calendar and info from the outlook app doesn’t sync with the Samsung. I have to access Outlook app to see any of the data. i use 2-step verification thank you in advance for the help. —        Fivos

Solution: Hi Fivos. Samsung Calendar app appears to only support 4 accounts which are:

  • Samsung account
  • Exchange
  • Google
  • Microsoft Exchange ActiveSync

We can’t see any option to add or sync Facebook calendar to the stock Calendar app either so it’s limited by design. That means that it’s not built to sync with the account types you’re trying to sync here. Unfortunately, there’s nothing much that you can do about it right now.

Problem #10: Galaxy S7 won’t read mp3 files after an update, SD card corrupted after an update

March 30, 2017 came a new update for my phone so I plugged it in and let it run its course. When it finished I realized that none of the mp3 files on my SD card worked saying “Sorry, this player does not support this type of audio file.” The photos on my SD card were also blank, yet all the files showed they were still there with their respective sizes. I’ve deleted and downloaded the same app, a new app, tried opening the files on another S7, restarted the phone (once with and once without the card inside), moved them to the phone and back, moved them to Google drive and back, and all with the same result. Nothing supports the files and shows blank pictures. I’m confused as to why the update even touched anything on the encrypted SD card, much less why it did what it did. What should I do? — Felix

Solution: Hi Felix. Since you have an encrypted SD card, you have very limited options at this time as the only device that can read it is only your phone. Letting another device access your files is obviously pointless so your only chance of using it normally again is to reformat it. We know this will delete the files you’re keeping in it but there’s really nothing that you can do at this point. We can’t say what happened exactly but the update may have changed some operating system parameters, which may have affected how it reads the card. An unknown software or app glitch may have caused the problem after the update. Whatever it is, there’s no way to find out. To prevent this issue from happening again, always make it a habit to create a back up of important files regularly to another device before installing an update. Updates change core operating system parameters so there’s always a chance that some things may not work as expected afterwards.

 


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  1. Having trouble with SD card after April 2017 update with AT*T on my Galaxy S7 Active. Help!! Says SD card can not be recognized and lots of my photos are there. Went to AT*&T store rep talked about putting the SD carrier in a carrier and setting in a computer for a little while but did not solve problem. Any ideas?

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