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Wet Galaxy S7 won’t charge via USB, won’t download new emails after an update, other issues

Hello Android community! The #GalaxyS7 is water-resistant but what happens if water or some moisture are caught inside the USB port? In this post, we discuss what you need to do if you happen to expose your phone to water and you encounter a charging problem with it. We also cover 5 more S7 issues so we hope that this post can be a helpful reference for you.

Below is the complete list of issues addressed in this material:

  1. Wet Galaxy S7 won’t charge via USB
  2. Galaxy S7 email app won’t download new emails after an update
  3. Galaxy S7 only works when connected to a charger
  4. Galaxy S7 charging port not working properly
  5. Galaxy S7 multiple issues after installing Android update
  6. Galaxy S7 slow performance issue 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: Wet Galaxy S7 won’t charge via USB

Yesterday, my Samsung S7 phone fell into the toilet (clean bowl, whew!) and I quickly retrieved it. It didn’t shut off and seems to be working ok. I noticed that it wouldn’t charge with the charger inserted at the charging port but it worked with the platform charger. I placed it in the rice over night as per your instructions and that I had heard of this technique but never turned it off (afraid that it would not turn back on). Again, so far the phone appears to be okay. Do you think I am in the clear that it will be fine? —         Cookmoore4u

Solution: Hi Cookmoore4u. The Galaxy S7 is water-resistant so there’s no reason for you to be concerned if you drop it in shallow water. The IP68 certification on this device should be enough to protect it from water damage as long as you don’t submerge it deeper than 1.5 meters for 30 minutes. The thing that should concern you though is the unnecessary shock from the fall, especially if it hit the solid portion of the bowl.

Because the Galaxy S7 does not have external protection against water penetration in the charging port area, it is equipped with a special feature that prevents it from charging via cable if the system detects moisture. This feature usually shows a corresponding error when there’s water particles detected in the charging port area that says: “Check port: Moisture has been detected. To charge your device, make sure that your charger/USB port is dry.” If your phone does not display this error but refuses to charge, that means that it’s still not safe to charge by cable. You must first ensure that the charging port is dry.

To do that, first you need to make sure that you wipe the phone dry using a clean soft cloth. Then, you want to shake the phone hard, with the charging port facing downward to remove any excess water. Do this until your phone charges again. Alternatively, you can use a hair dryer to dry the phone for a few minutes. Be careful not to heat your phone up too much as that might damage it. Again, wipe the phone until it becomes dry, or until all moisture is gone. If you think that the phone is dry, restart it and try charging by cable again.

Problem #2: Galaxy S7 email app won’t download new emails after an update

Downloaded the newest system upgrade to my Samsung S7. Now I can’t receive emails from the (Microsoft Exchange) Microsoft 365 server – work email. It “syncs” but the newest emails still won’t show up. Turned off and restarted phone and also deleted/added account. I received the newest emails to when the new account was turned on (newly added) – but can’t receive new emails. Having to use Microsoft 365 on Google to receive any emails. Any suggestions? — Marc

Solution: Hi Marc. The first thing that you want to try here is to wipe the cache partition to ensure that the phone is using a good system cache. This is a standard troubleshooting step when it comes to issues following a system update. Here’s how it’s done:

  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.

If refreshing the system cache won’t help, the next thing that you want to do is to delete the cache and data of the problematic email app. Here’s how:

  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.

Finally, if you think it’s worth the hassle, consider doing a factory reset to fix the problem. Remember, factory reset will delete all user data in the phone’s internal storage device so make sure that you create a backup first.

To factory reset your S7, follow these steps:

  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 #3: Galaxy S7 only works when connected to a charger

I own a Samsung Galaxy S7. Yesterday I realized it was shut off and when I tried to turn it back on it wouldn’t power up. So I plug the charger in and turned it on and it worked but when I tried unplugging it from the charger and it automatically powered off. I also tried factory reset restoring it and also would not work. so my phone only works when it’s plugged into the charger and when it’s plugged into the charger it gets up to 86% charged and stays there.        — Peyton

Solution: Hi Peyton. There’s only one thing that we can suggest for you — battery recalibration. If this won’t work, that means you need to send the phone in so the hardware can be examined. The problem may be limited to the battery or something serious such as a bad power IC or an unknown logic board glitch. Whatever it is, the best thing that you may have to do is to get a replacement. If your phone is still covered by a warranty, Samsung may replace your phone for free. Otherwise, you may have to pay for either the repair or replacement.

For reference, here are the steps on how recalibrate the battery:

  1. Use the phone by playing games or doing tasks to hasten power discharge, until the phone turns itself off.
  2. Turn the phone on again and let it turn itself off.
  3. Charge the phone without turning it back on.
  4. Wait until the battery says it fully charged to 100%
  5. Unplug the charger and turn the phone on.
  6. If the phone says it’s not 100% anymore, turn it off, plug the charger back in and wait until 100% charge is reached.
  7. Unplug the charger the turn the phone on again.
  8. Use the phone until you drain the battery down to 0.
  9. Repeat the cycle once.

Problem #4: Galaxy S7 charging port not working properly

My phone is only a few months old. The charging/data port will only accept a charge if I position the cord just right and then tape it to the phone. Even then it is very difficult to get the phone to charge. I have tried other cords. In my opinion the phone should have been designed with the old style round DC charging port, and a different port for data. Or an inductive charging system so it is not subject to the every day friction of plugging and unplugging. Very frustrated. — Schlip76

Solution: Hi Schlip76. Your phone’s charging port must be damaged so the only fix for it is hardware fix too, which means repair. If possible, let Samsung do the repair for you. Better still, try to check if you can have the device replaced.

Problem #5: Galaxy S7 multiple issues after installing Android update

Hi there and thank you for your very helpful advice site. I did an update a few days ago. My phone is quite new and worked fine although a little slow, and recently I have noticed the home screen is a bit wonky. Doubled up time digits and other indicator images across the top of the screen. Since doing the update, the messaging app crashes every time I try to go into the emoji menu. 🙁 

I would like to know, firstly, how to do a back up of my data, and what would disappear after a reset – e.g would I lose all of my text conversations?

Secondly, is there a way to fix this crashing problem?

Thirdly, can I delete the update of the OS? Thanks so much. — Kat

Solution: Hi Kat. If the most recent Android update did not go well for you, make sure that you do the standard troubleshooting for the issue as detailed above. Basically, what you need to do includes the following:

  1. wipe the cache partition
  2. install app and system updates (if any are available at this time)
  3. factory reset

The steps for wiping the cache partition and factory reset are provided above.

In creating a backup, we recommend that you use the official Samsung Smart Switch app so you can do it easily. You need a computer where you can install the Smart Switch app. Once you have the app installed on your computer, it’s just a matter running the app and hooking your phone to your computer.

For reference, below are the exact steps on how to use Smart Switch to back up your files.

  1. Install Smart Switch on your PC.
  2. Connect your new Galaxy device to the desktop.
  3. Now open the Smart Switch app on your computer, and connect your Galaxy device to it with a USB cable.
  4. Back up your old Galaxy device by clicking the ‘Backup’ option on the Smart Switch app. Remember that you need to unlock the lock screen before proceeding.

Is there a way to fix this crashing problem? Well, we hope that wiping the cache partition would but if not, the factory reset option should definitely fix it. If you don’t want to do factory reset right away, you can also wipe the cache and data of the messaging app to see if that will make any difference. Remember, clearing the data of an app is the virtual equivalent of uninstalling the app so if you want to save some conversations, make sure to create a backup first.

To delete an app’s cache and data, follow these steps:

  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.

Can I delete the update of the OS? No. system updates can’t be removed from the system. If you want to, you’ll have to risk bricking your phone by manually flashing an older Android firmware. If you’re interested how to do it, try to do some research on how to flash firmware on Samsung devices. For that, Google will surely come handy.

Problem #6: Galaxy S7 slow performance issue after an update

Hello. I have a Samsung Galaxy S7 that I recently got. My carrier is Rogers. The problem with my phone is that sometimes after opening an app, scrolling too quickly, or skipping too many songs, my phone freezes. It’s like the processor can’t keep up with the phone. I empty my cache often and remove miscellaneous files from my storage. But it barely has an impact. After the phone freezes, I have to restart it by pressing and holding the power button. Once it restarts it starts working again. This is just super annoying. I would greatly appreciate any suggestions. Thanks. — Joyshah99

Solution: Hi Joyshah99. Slow performance can be an indicator of both software and hardware problem so your first task is to narrow down all possible causes. The general rule is to exhaust all software troubleshooting. If nothing changes after doing all relevant software troubleshooting, you can assume that bad hardware is to blame. The list of software procedures that you must do for this issue does not vary much from other issues mentioned above. Slow performance is a tricky problem and its cause can be hard to pin down. Sometimes, this type of problem can be caused by inefficient or poor coding so it’s very likely that there’s something that you can do about it. In some cases, a corrupted system cache is the cause so make sure that you do the steps on how to wipe the cache partition provided above.

In a lot of cases, Android users tend to forget the fact that installing a system update does not necessarily mean installing app updates. Is that problematic? You bet it is! Not all apps are created equal. Many popular apps can be financially rewarding for a developer, which means that they can afford to spend resources to regularly monitor  and update their product. Some apps may not be too lucky and they may not receive regular patches or updates from their respective developers. And this is where the problem usually lies. If an app can’t cope with the ever changing Android environment, there will come a time that it can create a conflict with the most recent Android version. This is especially true for old apps that may no longer receive necessary updates to work with, say, Android Nougat. If you install such an app in your phone, it may become incompatible, which can lead to instability or slow performance problem. That said, it’s your responsibility to make sure that all apps are updated and compatible. If you have a lot of apps, invest some time to research if each one is compatible with the current OS version.

Also, make sure that you lessen the number of apps in your device. If you haven’t used an app for the last 2 weeks, chances are, it’s not that important. Be sure to uninstall it. Keep in mind that the more apps you install, the higher the chance of encountering bugs due to higher number of possible points of failure.

Finally, if all else fails, do a factory reset. It’s a bit drastic but’s a proven effective solution for post-update issues.

Now, if factory reset won’t improve the situation and the phone continues to freeze, there may be a hardware malfunction somewhere. To find out what it is, send the phone in, or better still, have it replaced.

 


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