Galaxy S7 reboots on its own when in an area without cell coverage, other issues

Hello Android community. Welcome to the new #GalaxyS7 article that addresses some common issues for this device.

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.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy S7 overheating when charging, won’t fast charge

My Samsung Galaxy S7 has not been operating correctly for a couple of months. It is getting hot both when charging and when unhooked and in my bag (the worst). I am also finding it not charging except with a fast charger and will not fully charge starting a couple of days ago. It is connected right now and shows the lightning bolt but is losing charge.

One other issue is that the screen saver comes on and interrupts me as I am trying to log into the phone. This started prior to this problem although I have noticed heat on and off since I had the phone. I have already done the delete of the system cache as you suggested. I am leaving for Mexico in a couple of days and it is critical that my phone works. Thanks! — Misha

Solution: Hi Misha. We are here to provide software solutions to Android problems. We assume that your phone has not been dropped or got wet before as they are usually the two most common reasons for hardware malfunction. The software solutions that you’ll usually find in the internet won’t fix any hardware defect. If the problems you mention above occurred after the phone got water damaged or accidentally dropped, don’t waste your time browsing our blog. Instead, simply bring the phone to Samsung or to an independent service center so the hardware can be checked.

Now, if your phone was never dropped or exposed to elements before, it’s possible that the cause may be software in nature. This means that you might be able to fix the problems without resorting to repair.

Try a different working charger

Since you appear to have a charging problem, the first thing that you want to do is to see if it’s due to a bad charger. If you have a friend with a Galaxy S7, try borrowing his/her fast charger and see if it works in your phone. If the phone still fails to fast charge, there may be a problem with the charging port. In that case, you’ll want to send the phone in so the defective port can be replaced.

Sometimes, a malfunctioning charging port can also cause the bottom part of the phone to get uncomfortably warm when charging. If this is happening in your device, that’s a clear indication of a bad charging port issue.

As a workaround, try using a wireless fast charger that came with the device. This will allow you to charge the phone. The USB port will still remain defective though and you won’t be able to move files via USB cable as long as the said port is not fixed.

Install app and Android updates

Sometimes, updates can fix problems and address glitches. Make sure that you install the latest versions of all your apps and the operating system.

Observe in safe mode

Another good troubleshooting step that you must do when it comes to any Android issue is to see if a third party app is problematic. Since apps are the lifeblood of smartphones, it’s just logical to check if any one of them is messing up with the system, leading to the particular symptoms you’re experiencing. When booted to safe mode, all third party apps will be suspended, allowing only pre-installed apps to run. If the phone works normally and the symptoms are absent at this time, that’s an indication that all of them are being by most probably an app.

To restart your S7 to safe mode, kindly do these steps:

  1. Turn your Galaxy S7 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.

Wipe the phone with factory reset

A drastic software solution that you do as a final step is factory reset. This procedure will restore all software settings to their defaults so if a glitch that has developed over time is the one causing all these problems, you’ll most likely get rid of it. Factory reset will erase your phone’s user data such as photos, videos, etc. so be sure to create a backup before doing it.

Below are the steps on how to factory reset your S7:

  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 2: Galaxy S7 reboots on its own when in an area without cell coverage

Problem with Samsung Galaxy S7 active. i was working in an area with no cell coverage (signal). I install hughesnet and use an app to complete each job. i would say 85% of the places I go don’t have cell coverage. this has happened multiple times this summer. i just assumed the phone got too hot because it was 100°+. However this time it was around 55°. Phone starts power cycling and wouldn’t let me do anything. it wouldn’t even show keyboard when I tried to use between power cycles. then as soon as I get back in to an area with cell coverage the phone starts working. no problem since. until the next time it happens. whenever that will be. — Kevin

Solution: Hi Kevin. If you suspect that HughesNet Mobile app is associated with the problem you’re having, it’s pretty simple to nail down. Simply uninstall the app and all its associated services and see how your phone works in an area without cell coverage. If it doesn’t reboot on its own, then you bet it’s the HughesNet Mobile app that’s problematic. Alternatively, you can do a complete wipe by doing a factory reset so you can observe how your phone works in an area with no cell signal. If the phone works when there are no third party apps installed including HughesNet Mobile app, you’ll know the problem is being caused by an app, most probably by HughesNet Mobile. To fix the issue, be sure to let the developer of the said know so they can take a look at your particular system and situation.

Problem 3: Galaxy S7 won’t enter Recovery Mode after failed flashing procedure

I was having trouble with 6.0.1 so i flashed Nougat and decided to flash back to 6.0.1. i  always do a master reset before flashing on my phone. Well, while flashing, i noticed that it failed and i noticed on Odin that it failed because it could said that complete operation failed because it could not write. I therefore turned my phone off and tried to restart it but the phone stayed black and i tried to enter into recovery mode, the blue came on saying that i was entering into recovery mode and went black again. — Lamar I

Solution: Hi Lamar. There a lot of variables that can come into play when flashing and some of them can lead to serious problems. Since there’s no way to know what causes the problem you’re having right now, we suggest that you do these things:

  • ensure that you’re using a correct flashing guide for your particular phone model
  • reflash the bootloader

Reflashing the bootloader is similar to flashing the firmware. Below are the generic steps on how to do it. The exact steps may be a bit different for your phone model so be sure to cross check our guide with other guides.

  1. Look for the correct firmware for your phone model and download it. Make sure that you select the right one. It should be the same exact firmware that ran previously on your device. We assume that you list down the firmware version somewhere. If you did not take note of it before, there’s a chance that you may pick the wrong one. As you may know now, using an incorrect firmware can cause complications so good luck with that.
  2. Let’s now say that you have identified the correct firmware. You then want to download it to your computer. The firmware file should have a bunch of files in it like AP_, BL_, CSC_, etc.
  3. Look for the file that starts with a label BL; this should be the corresponding bootloader file for this firmware. Once you’ve identified the bootloader file, copy it to your computer’s desktop or to any other folder that you can easily access.
  4. Proceed with the rest of the flashing procedure using the Odin program.
  5. In Odin, click on the BL tab and make sure to use the bootloader file you’ve identified earlier.
  6. Now, make sure that the Device Added status and its ID:COM box has turned blue before hitting the START button. This will initiate the flashing of your phone’s bootloader.
  7. Restart the phone once the procedure is finished.


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