Galaxy S7 Edge charging session takes longer than expected, other issues

Galaxy S7 water damage

With tens of millions of Galaxy S7s and S7 Edges sold worldwide only weeks after Samsung’s new flagship phones were released, we are expecting more and more issues to reach us in the coming weeks. In the meantime, below are some of the early problems some users have encountered on their #GalaxyS7 series phones. We hope that the advice we provide here help others who are yet to contact us.

  1. Galaxy S7 and other Android devices load websites slower using a mobile browser
  2. Galaxy S7 keeps restarting on its own and changing settings and notifications back to default
  3. Galaxy S7 Edge charging session takes longer than expected
  4. Galaxy S7 not detecting SIM card error during calls
  5. Galaxy S7 Wi-Fi not working properly
  6. Galaxy S7 stuck in Safe Mode after dropping it in water

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 and other Android devices load websites slower using a mobile browser

OK here’s a tough one. I’m a cable guy and also have a degree in computer science.  I was at a customer’s house and i fixed all the cable issues for their modem.  I can run a speed test directly connected with a laptop and get almost 400MB download. Wirelessly with the Speedtest app i can get about 280 or so; they’re paying for 300.  I can browse the web with a browser with lightning speeds with a windows computer, Apple phone and i even brought a computer from home that has a Linux partition on it and they all work fine.

Also, with the Android devices I’ve used it takes almost 4 minutes to load any web page. I’ve tried multiple devices (2 different Galaxy S5 phones, Galaxy Tab S2, Nexus, Galaxy S3, Galaxy S7 and my Note 5). All of these devices are having the same issue. The devices run anywhere between KitKat, Lollipop or Marshmallow. All apps work fine on the devices for speed except the browsers. The browsers I’ve tried are Chrome, Firefox, Flashfox, and the native Google browser.

I’ve tried swapping the gateway to 3 different brands and this issue continues to persist.  I’ve looked closely at the DNS settings and double checked they are correct. I’ve tried typing in the domains direct IP address and the same issue happens. Tried different browsers on several of the devices. I disabled IPv6 on 2 of the routers to check to see if there is a conflict there.

Any ideas would be great to help this family out? I’m completely out of ideas. — Duff

Solution: Hi Duff. This is interesting. No normal mobile browser should take 4 minutes to load a webpage. Even a download speed of less than 10Mbps should not take that long.

Slower page-load time in a mobile browser can be due to a number of reasons including a fault on the server-side. Not all websites are optimized to be viewed in mobiles and a lot of extra information that are not necessarily useful for mobile use may be sent in the process, resulting to longer load time. In order to save effort and money, site developers may not want to build a separate mobile website, which is not really a problem for sites with deep pockets like or

If the Android devices you’ve tried still load known fast mobile sites like Google or Facebook longer than a minute, then something must be wrong with these handsets.

Try to see if there’s any common third party app on all of them as that may be causing the slow load time. Or you can try to boot one of the handsets to safe mode to see the difference. Better still,  consider doing a factory reset on one of them and try the mobile browser again without installing any app. This should give you an idea if there’s a third party app that’s causing the slowdown, or if a firmware glitch is to blame.

Problem #2: Galaxy S7 keeps restarting on its own and changing settings and notifications back to default

Gave up an HTC that was old to get an S7. Worked fine the 1st day, except it was restarting every couple hours. When it would restart it would change several settings back to default. Only problem was that it wouldn’t change the same ones every time. Second day ALL the notifications quit. Just shows Sprint in the top right corner. No active apps. No temperature from weather app that was there day before. Turn all the notifications I could find on.. Now the blue light blinks but it doesn’t tell me what i need to look at… Haven’t done a hard reset yet. I am hoping there might be an alternative. Any help will be reqarded with at least 1 or 3 Thank Yous. — Thomas

Solution: Hi Thomas. Did you install anything like an app or update prior to noticing the problem? If you did, make sure that you clear the phone’s system cache first. Outdate or corrupted system cache can lead to all sorts of problems so it’s best to ensure that it’s refreshed.

  • Turn off the phone.
  • Once the phone has completely shut down, press and hold Volume, Home, and Power buttons at the same time.
  • Wait until the Samsung logo appears before releasing the Power button.
  • Once the Android logo shows up, release the two other buttons.
  • Wait for the Recovery menu to appear (may take up to a minute).
  • Go to wipe cache partition option using the Volume buttons, then press Power button to confirm.
  • Wait for the device to wipe the cache partition
  • Once the cache has been deleted, Reboot system now option will then be highlighted.
  • Press Power button again to confirm the reboot.

If nothing will change after wiping the cache partition, your next task is to see if an installed third party app is to blame. You can do so by booting your S7 in safe mode. Here’s how:

  • Turn your Galaxy S7 off.
  • 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.

While Safe Mode is enabled, no third party app or service is permitted to run. If the issue won’t occur, that’s your clue that one of your apps is the culprit. You have to uninstall apps until you have eliminated the source of trouble.

Problem #3: Galaxy S7 Edge charging session takes longer than expected

Hello. My Samsung Galaxy S7 Edge is charging but was taking so long. It took 5 hours to charge it but it’s only been 77%. When I bought the phone, they said I should drain it when first before charging it. Charging should take 3-4 hours. But yesterday, I did drain it but had to open it because I had to do something. While I was editing my files in Microsoft, it took me 6 hours. And it was still 22 % while charging. So I shut the phone down. After 2 hours I pulled the plug. It’s only 22 percent. Then it got down to 11 percent immediately. I drained it by using it. After hours I charged it again. So yeah after 6 hours it’s only been 77 percent. What should I do? Thank you.. God bless you…– Jacky

Solution: Hi Jacky. First of all, the new Galaxy S7 has a fast charging feature that should shorten the charging time. We assume that you’re using the original Samsung charger that came with the phone and that Adaptive fast charging feature is enabled on the device. Samsung claims this feature can charge your device up to 50% in only about 30 minutes. To activate this feature, just go to Apps>Settings>Battery, and then tap the Fast cable charging switch.

Now, in order for fast charging feature to work as expected certain conditions must met that includes the following:

  • The phone or screen must be turned off
  • The Samsung Adapative charger or one that supports Qualcomm Quick Charge 2.0 must be used. If you are using the original charger then that’s the one.
  • The device must not be overheating. Keep in mind that it’s perfectly normal for the phone to get a little warm during charging. However, if it becomes uncomfortably hot, it can automatically shut the fast charging feature down, or the entire charging session entirely. This is a normal operating procedure of the device to prevent damaging itself.
  • Make sure that you are charging inside a room with normal room temperature. If the ambient air temperature goes up, the fast charging feature will turn off automatically.

Sometimes, multiple apps and services running actively and in the background during a charging session can drain power faster than the charger can deposit a charge to the battery. Consider booting the phone in safe mode or simply turn off the phone to achieve faster charging time.

The following best charging practices may also help you:

  • Turn off your device while it is charging.
  • Verify that you are using the Samsung USB/charging cable and Adaptive Fast Charger included with your device, not third-party accessories.
  • Ensure the USB/charging cable is connected securely and is not being blocked by a cover or case.
  • Check whether a battery or charging indicator appears on the device’s display when the USB/charging cable is plugged in.
  • Charge using a wall outlet, not a computer.
  • When the battery is fully charged, disconnect the device from the USB/charging cable.

Problem #4: Galaxy S7 not detecting SIM card error during calls

I really have several issues but my biggest issue is that I frequently get an error message that tells me to reboot my phone because the SIM card is not detected. Lately this happens right in the middle of phone calls.

Also, when I make phone calls my connection speed drops from 4G LTE down to 4G. These might be inter-related maybe not.

Another issue: sometimes when I call someone I do not get a ring tone then I cannot hear the person i called. Usually I have to reboot my phone before I can make a call that will actually allow me to hear the other end of the line. It says dialing but I never hear the dial tone then I can’t hear the other end.

When i record video the playback is horribly distorted. Like not even recognizable. Thanks for your help in advance. — John

Solution: Hi John. All the concerns except the first one about the SIM card not detected error may be firmware-related so it won’t hurt if you can perform a factory reset. Doing so will help you determine if there’s a noticeable difference when you record a video or make a call. If you haven’t done it before, simply follow these steps:

  • 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.

The main issue about the SIM card getting disconnected may or may not be hardware-related. If nothing changes after a factory reset, make sure to have the phone checked for potential repair or replacement.

Problem #5: Galaxy S7 Wi-Fi not working properly

Hello Droid Guys! I have a Samsung Galaxy S7 and am having a few problems that I cannot seem to fix. The problems are:

– Phone will not connect to Wi-Fi

– Error message: “Cannot connect to proxy server”

However, apps still update via download even when mobile data is turned off, but apps that need internet do not work. I have tried on multiple Wi-Fi servers so I know it’s not my router. Wi-Fi has worked on this phone with no problems for several months.

What I have tried that has not worked:

– uninstalling and reinstalling Internet browsers

– doing a system reset on my phone

I hope you can help! I really don’t want to buy a whole new phone. Thanks! — Megan

Solution: Hi Megan. Firstly, we presume that what you mean by system reset is factory reset. Our question is, did you check how Wi-Fi worked right after doing a factory reset without first installing your apps back? If you did re-install your apps first after a factory reset before recreating the issue, you may have missed an important opportunity to identify the trouble maker. Consider doing another round of factory reset, then test Wi-Fi functionality right after.

There’s no reason for a new device like your S7 not to work properly unless the Wi-Fi radio itself is broken. Consider having the phone replaced if the problem returns.

Problem #6: Galaxy S7 stuck in Safe Mode after dropping it in water

Hi. I submerged my S7 Edge in a shallow pool of 1.20M for 5 seconds and the camera area fogged up, the sound was distorted and the phone went into safe mode.

Now, all the problems have been resolved – the speakers are working fine, the camera fog has cleared up but I am unable to get it out of safe mode. The option says click to disable safe mode and that the phone will restart but it still restarts in safe mode. Please help! Thanks! — Karan

Solution: Hi Karan. The new Galaxy S7 Edge comes with IP68 certification, which means that you can leave it submerged in 1.5 meters of water for 30 minutes at most. Beyond these figures, water pressure can penetrate the device’s seals and create a mess. And speaking of seals, it’s important that they are properly in place before the handset hit water or else the certification is useless. That the camera fogged up and the speaker may have been affected after the water exposure is an indication that some amount of water may have found their way into some parts of the device as well, perhaps in the contact points of the hardware buttons, causing the phone to boot in safe mode.

As you can see above, booting in safe mode involves pressing the Power and Volume buttons and any of them may have been holding some water at this time.

For an S7, you can normally disable safe mode as well by doing a soft reset by pressing the Power and Volume Up buttons for at least 10-20 seconds. If this simple procedure won’t do anything, consider doing a factory reset instead.

Should everything fail, you can assume that there’s a hardware problem that forces to boot the phone in safe mode only. Have the phone replaced.


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