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What to do if Galaxy S8 keeps saying “moisture detected” and won’t charge

Many people expose their water resistant device to water and complain later. This post should be another reminder of what to do when a device like the #GalaxyS8 may stop charging due to moisture detected error, or after the phone has been wet. Just because an S8 is water resistant does not mean you want to intentionally expose it water or swim with it in the ocean or pool. High pressure water like in the sea waves or swimming pool can potentially damage an S8. Samsung’s IP68 rating on their devices are highly overrated and does not work reliably. Unless money is not an issue, we say you avoid exposing your electronic device to water to prevent problems. If you’ve already acted foolishly and now having a water damaged device, see our suggestions below.

Before we proceed, we want to remind you that 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. 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: How to install OTA update for AT&T Galaxy S8

I have a Samsung Galaxy S8 (SM-G950U) that was bought from AT&T. It is now on T-Mobile. BUT it has an old software version from over a year ago, G950USQU1AQJC. I would like to update it to Android 8.0, but as you point out, it will not work on T-Mobile. Calls to Samsung were useless. Clearing Cache did not help. Smart Switch still tells me my software is up to date QJC(ATT) but AT&T’s own website tells me that this version is maybe 6 updates old. The phone is unlocked (obviously.)  I am not comfortable with flashing on the side. What I want to know is IF I go buy an AT&T Pre-paid SIM card and put it in my phone, will the phone eventually (or at least within the 30 days the card is good for) get the OTA from AT&T and do the update? It’s $30 for the pre-paid card, so I want to be sure this will work before spending the money. Everything else has failed. Thank you.

Solution: We haven’t tried it yourself so we can’t give you 100% confirmation if it will work. There’s a good chance that it will though as long as the phone is provisioned properly by AT&T. Since it’s originally from AT&T itself, there’s a good chance that it will receive an update for Android Oreo. Over-the-air updates are managed by an automated system and we don’t know exactly how often AT&T’s system push updates for compatible devices. As long as your phone was in good standing with AT&T and you can use AT&T’s prepaid services without issues, you may be able to OTA update your S8.

If you have a friend who can let you borrow his or her SIM, we suggest that you go that route instead of buying a SIM card. Once you’ve inserted the SIM card, be sure to manually check for updates under Settings > Software update. If that won’t work, wait for 24-48 hours before attempting another check. Some carriers may set a certain period of time that a device has been continuously connected to their network before an update may be paused. Try to talk to an AT&T representative if your phone is still unable to update after the prescribed time period.

Problem #2: What to do if Galaxy S8 keeps saying “moisture detected” and won’t charge

I’m in the military and I’ve been in the field for about two weeks and while I was out there my phone was giving me moisture cant charge for a whole day until it just went to slow charge instead. I’ve tried to see if turning the phone off and charging it would work but that just displays moisture problem and wont let me charge at all. any ideas ?

Solution: If your S8 keeps showing the moisture detected warning, that’s probably because the charging port is wet or has presence of moisture. This is meant to prevent the phone from developing rust or corrosion but also to avoid shorting the motherboard. Corrosion in the charging port or around its vicinity can lead to more serious hardware issues in the long run.

If there was a chance that your S8 may had been wet in the field, we suggest that you do the most obvious thing first: dry the charging port.

Dry the phone

Water deposited in the charging port naturally evaporates on its own after some time but if the charging port has presence of other forms of liquid, you may need to manually clean it. Samsung advise against immersing the device in salt water, ionized water, soapy water, or hot water. If your phone was exposed to any other form of liquid other than fresh water, be sure to rinse it thoroughly in fresh water. Then, dry the phone by wiping it with clean soft cloth and  gently shaking it to dislodge as much residue in the charging port as possible. If there’s any residue remaining in the charging port, the device may refuse to charge.

Avoid sticking anything inside the charging port to avoid damaging metal pins or connectors. You can also try to gently blow into the port to dry it out. Do not use a can of compressed air as that might push moisture inside, even if you think the phone’s water resistance protection is intact.

If none of the above works, or if you’ve already tried them before contacting us, then you’ll need to let Samsung handle the situation. Go to your local Samsung store and have the phone repaired.

Wireless charging

If you wish to turn the phone on so you can back your files up to the cloud, try to charge the phone wirelessly. Your S8’s wireless capability does not need a working charging port so it should work even if the charging port is damaged or wet. Be sure to use an original Samsung wireless charger for this task.

Problem #3: How to fix a Galaxy S8 that has stopped charging

Hey there thanks for your site. I’ve had an issue for several days with my galaxy S8. It stopped charging on my normal original charger. i let it go for about 24 hours, then switched to a 1A charger and it registered charging. That worked but slowly. After i was able to use my rapid charger no problem. Then a few days later i got a few phones calls and put it on and off the charger and bam it stopped charging all together. I did the soft reset, used 4 different bases and 3 different cords. I plugged it into the computer and that worked. i let it charge for 50% until turning it on, in which it stopped charging! Not sure if there’s an easy solution, it won’t link to my computer currently to get my pictures. I just watched a video on changing the battery and that’s extensive. Any help would be great please and thank you!

Solution: We have no way of knowing whether the issue is being caused by a bad battery or by some other hardware failure without physically checking and diagnosing the phone ourselves. We suggest that you do two things instead:

  • wirelessly charge the device, and
  • factory reset it.

Charging your S8 wireless, as pointed out above, is a good way to charge the battery in this situation. Once the phone boots up normally again, you can then start backing up your files to the cloud (if USB connection to computer is not possible). Alternatively, you can move files to your computer wirelessly with the help of third party apps like Shareit or similar.

Factory reset may be a necessary troubleshooting step for you if you want to find out if the issue is being caused by a software bug. We don’t know the full history of your device so we can’t say whether or not software is to blame. If your phone continues to fail to charge by cable after a factory reset, then you can assume that bad hardware must be causing it. To fix the issue, you should send the phone to Samsung.

For reference, these are the steps on how to factory reset your S8:

  1. Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, ‘Reboot system now’ is highlighted.
  9. Press the Power key to restart the device.

Problem #4: Galaxy S8 keeps going back to home screen when using apps after phone got wet

My phone got wet. It didn’t seem or look like I had any issues with my phone until I went into one of my apps. It’s letting me in my apps but then it kicks me out & put me back to the front of my phone screen..so I then have to hit the left symbol on the front bottom of my screen & get back into the app I was in. Its upsetting me bc I can’t even text a whole sentence or online shop or text because it’s not letting me stay in the app. I have no clue what to do & I hope you’ve had this type of problem before & that it can easily be corrected. I don’t want the aggravation of having to get another phone & having to re download all my apps..texts..photos..ect. Thank You for your attention into trying to help me solve this upsetting..stressful & frustrating situation!

Solution: The Galaxy S8 is a water resistant device and should offer basic protection against splashes or even a brief, low-pressure dunk in a pool. However, this water resistance protection may be compromised if the phone is physically broken or accidentally dropped before. If your S8 was no longer protected from water exposed before you got it wet, it’s possible that water may have seeped inside and into some parts, causing the problem you’re experiencing right now. We suggest that you let a professional check the phone to see if there’s any moisture or water left in the screen area or in other parts. We don’t think bad software is to blame for this issue so doing some software troubleshooting is pointless. You can, of course, revert all software information to their defaults by doing a factory reset but we doubt if that will make any difference at all.

 


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