Galaxy S7 “SD card unexpectedly removed” error, other issues

Are you experiencing problems on your #GalaxyS7? Keep reading as this post may help you. This material tells you what to do if faced with the issues mentioned below. We hope that our suggestions will help Android community now and in the near future.


Here are the specific topics we cover today:

  1. Galaxy S7 keeps losing LTE and 4G connectivity
  2. Galaxy S7 “SD card unexpectedly removed” error | Galaxy S7 random reboot issue
  3. Galaxy S7 loses mobile network connection
  4. Cannot turn off Ultra Power Saving Mode (UPSM) in Galaxy S7
  5. Galaxy S7 won’t charge
  6. Galaxy S7 audio not working

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 keeps losing LTE and 4G connectivity

Received first phone in March, with replacement phone end of July. Both phone drop off the LTE network and into 4G. Intermittently unbeknownst to me I am not receiving calls or texts until I try to make a call or send a text. When making a call I either find a message that comes up indicating that I am not registered on the network or I do not hear a phone signal when trying to connect. If I am sending a text, it does not go thru. At that point I am stuck in 4G and am off the network until I perform a reboot. When rebooting I find that I am now connected back onto LTE. This is happening from multiple locations and is unpredictable. Working with the carrier, I have factory reset my phone, factory reset without adding or updating any software, received a replacement phone, had 3 SIM cards, lowered the network mode to GSM/HSPA (auto connect). I have previously used a Note 3 for 2 years and have never had this issue. Any suggestions on next steps? — Jeff

Solution: Hi Jeff. That the issue remains even after a factory reset is an indication that this problem cannot be resolved in your end. The cause can be a bad operating system, a glitch in the current baseband firmware, or something that occurs in your carrier’s network. Since you’ve already exhausted all the software troubleshooting that you can do on your level, we highly suggest that you talk to your carrier again for a permanent fix. If you’ve been speaking to your carrier’s customer service representatives (who may not be necessarily trained to handle technical problems) in the past, demand to talk to a higher level of support. Any SMS-related issue is best supported by service providers as there are other critical information that only they can check. It is in this sense that we urge you to find resolution with them and not with any other third party like us.

Problem #2: Galaxy S7 “SD card unexpectedly removed” error | Galaxy S7 random reboot issue

I have been browsing through your help responses to issues of SD cards unexpectedly “unmounting”. I have a Galaxy S7. Have you created a set of potential solutions and issues specific to this model? With S7, you cannot remove the battery. So current/classic reset strategies that require battery removal are not an option.

Also with S7, the SD card and the SIM card share a slot. So after initial install, there is no more opportunity for dust in the way of SD than dust in way of SIM – which is very unlikely because there is no battery removal or reason to open that phone compartment.

I have had my phone for about a month. I have done nothing new to my phone within 48 hours – no new apps, no new software updates. The microSD card and the SIM card have been in place since initial set-up and working fine until today. Then two things happened: 1) phone began automatically restarting itself (without me touching phone or using any apps) and 2) I received a “SD card unexpectedly removed error” and the card had not been removed or touched. Following the error, I did remove the card and check its contents on my computer using a card reader. Everything is still there. After reinserting, phone still does not recognize micro SD card. What steps should I take other than trying a new micro SD card? If a new SD card works, should I assume random error or do I need to dig to figure out how my phone damaged my SD card or if my phone has some corrupted software that disrupted the card reading ability?

Lastly, I already lost one Galaxy to this perpetual rebooting. My phone seems to have stopped that – after being powered down for 5 minutes. Is there something else I need to consider here. (Noting that no new apps or software have been installed in the last 2 days.) Thanks! — T. Matthews

Solution: Hi T.Mattews. To simulate the classic “battery pull” in a device with non-removable battery like the Galaxy S7, you must press and hold both Power Volume Down buttons for at least 12 seconds. Once the menu with options appear, use the Volume Down button to highlight the Power Down option, and the Home button to select it. If this virtual “battery pull” action won’t resolve your SD card issue, you simply have to move on to the next step. The fact that your phone has a non-removable battery pack does not necessarily mean that SD card solutions will be different. We don’t know what your expectations are but the general principles in dealing with SD card problem are not changed because you have a Galaxy S7.

If you think the SD card is causing the phone to reboot on its own or unexpectedly, the first thing that you want to do is to reformat the said storage device using your phone. If you are fond of recycling an SD card, that is transferring an old SD card to another device, make sure that said SD card is reformatted everytime you use it to minimize issues. If your S7 continues to refuse reading the SD card even after reformatting it, using a new one may resolve the problem.

SD card technology is not perfect and you must have heard of many cases of heartbroken and desperate users scouring the web for solutions to their failing SD card. That’s because SD card can fail due to a lot of factors, including some that are initiated by phones themselves. With millions of potential points of failures existing all the time within a running device, there’s always a chance that a bug may affect the SD card. Although SD cards have become more reliable over the years, even a very minor software, app glitch, or hardware error can still unexpectedly lead to file corruption. No SD card, however expensive it is right now, is totally immune to sudden glitch that might result to data loss. We can’t emphasize enough the point to always keep a backup of your important personal files. New SD cards can fail just as easily as old ones, depending on the cause. If your phone appears to have similar problem with a different SD card in the future, you must consider isolating the issue by doing some troubleshooting. We’ve created a brief list of things that you can follow to prevent SD card issues in this post. Make sure that you follow our suggestions.

For the random reboot issue, the first thing that you want is to check if software is to blame. This can be done by doing basic software troubleshooting such as booting the phone in safe mode, wiping the cache partition, and factory reset. If random reboot issue happens after a factory reset and without apps, then you can assume you’re dealing with a phone problem. Find a way to have it replaced.

Problem #3: Galaxy S7 loses mobile network connection

Within seconds after booting, my mobile network connection appears disabled, showing a triangle with an x in it instead of connection bars. The network does work for those brief seconds prior to the disconnect. I have screen shots showing the network in each state. When I say disabled I mean no calls, no texts, no internet. I took the phone into T-Mobile and the rep messed with it trying various things including replacing the SIM card (which was new with the phone). He finally said I needed to attempt a hard reset and if that fails to call in to get another phone. I backed everything up and did the reset, which worked for a couple weeks, then the problem came back. The only way for me to use the phone is to put it in airplane mode then turn on Wi-Fi. If I don’t enable airplane mode the Wi-Fi disconnects every few minutes. — John

Solution: Hi John. Have you considered the possibility that one of your third party apps may be to blame? Yes, some apps can create conflicts with the operating system, which can manifest in a lot of ways, including the problem you’re experiencing. To check, boot your phone in safe mode and observe it for at least 24 hours. Because this mode prevents third party apps and services from running, it’s an efficient way for you to get an insight as to the cause of the problem. This procedure won’t help you find the exact app so you must still do further trial-and-error methods to identify the cause. To boot in safe mode, follow the steps below:

  • Press and hold the Power key.
  • As soon as you can see the ‘Samsung Galaxy S7 EDGE’ on the screen, release the Power key and immediately hold the Volume Down key.
  • Continue holding the Volume Down button until the device finishes rebooting.
  • You may release it when you can see ‘Safe mode’ in the bottom left corner of the screen.

If the problem remains even when the phone is in safe mode, a hardware error may be behind the trouble. Contact your carrier to ask for repair or replacement.

Problem #4: Cannot turn off Ultra Power Saving Mode (UPSM) in Galaxy S7

I tried to turn on Ultra Power Saving Mode, but think I might have turned on Low Power Mode by accident. My screen is in greyscale, and while all my app icons are visible, all “non-essential” apps appear to be disabled because they don’t open when I click on them. This wouldn’t be much of a problem except that I can’t turn this mode off! There’s simply no option to do it in my settings any more.

I’ve never used PSM, only UPSM, and never encountered any difficulties before. I always had the immediate option to turn off that mode, even just through the drop down menu from the top. I don’t have that with this, nor can I disable it through settings. I’ve restarted the phone as well as cleared cache partition. When it turns back on after being restarted, for a few seconds it’s in color before it snaps back to greyscale. Thank you!! I’m at my wit’s end here… — Benjamin

Solution: Hi Benjamin. If you can’t disable UPSM under Settings>Battery>Ultra power saving mode, you can try another known workaround. This is done by going to Settings>Personalization>Easy Mode. Once you’re in Easy mode, you should see a UPSM screen with an option to turn it off.

You can also try to boot in safe mode and disable UPSM normally under settings but if this won’t work either, the only remaining option for you is factory reset. For reference, these are the steps on how to perform that:

  • Turn off your Samsung Galaxy S7.
  • Press and hold the Volume Up, Home and Power keys together.
  • When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  • Wait until the Android Recovery Screen appears after about 30 seconds.
  • Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  • Press the Volume Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  • After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Problem #5: Galaxy S7 won’t charge

Yesterday my niece got a hold of my phone and she was sucking on the phone. She was doing it on the charging port, were you plug the cord in to charge. I took the phone away and put it on the counter and didn’t bother with it until I was going to charge it.

That’s when my problem arose. The plug that I was using has been working just fine. A little screen popped up saying that the charger wasn’t compatible with my phone and to use the original charger. I used another charger but the same thing came up. My phone is now at 32% and being that I  use this phone as my main contact, I’m starting to get frustrated.

What wrong with my phone? I checked to see if it was water damaged, it’s not. I don’t know what to do. I did the safe mode thing, took out the SIM and SD card but put them back in. Now I’m just puzzled.. — Charlene

Solution: Hi Charlene. The Galaxy S7 has dust and water-resistance protection (IP68) but it doesn’t mean it’s totally immune to water damage. To check if moisture has penetrated the phone’s defenses, remove the SIM card and check the Liquid Damage Indicator inside the SIM tray slot. It is below the SIM frame and should be visible to you. If your phone is water damaged, the Liquid Damage Indicator should be colored brown and not pink.

If the LDI appears intact (still colored pink at this time), there must be another reason for the trouble. Moisture or saliva may have penetrated the metallic contacts of the power/accessory (USB) interface connector, bypassing the LDI, thus giving the appearance that there’s no water damage. Since you’ve already tried booting the phone in safe mode, consider clearing the cache partition first. Here’s how:

  • 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 cache partition.’
  • Once highlighted, you may press the Power key to select it.
  • Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  • Wait until your phone is finished wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
  • The phone will now reboot longer than usual.

if this won’t provide positive results, consider wiping the phone clean via factory reset (steps provided above). Finally, if factory reset will not fix the issue, have the phone checked for repair or replacement.

Problem #6: Galaxy S7 audio not working

I bought my phone, brand new, from Sprint in January. It has never been exposed to water nor have I dropped or damaged it in any way. Everything was fine until last night when i was talking on the phone and suddenly the other party could not hear me. The phone was not muted i checked all settings, restarted  in safe mode – nothing helped. All software is up to date.  This evening i was listening to music using the headphones and i noticed that the volume was very low. When  I attempted to increase the volume, i saw the usual warning but now, the volume is being restricted. It is far too low to even hear at the gym! I’m very upset and tbe last thing i want to have to deal with is a factory reset, as it seems like a nightmare. — Jill

Solution: Hi Jill. Well, you’re really out of options at this time. There’s no special troubleshooting that can help in this case. You must try factory reset first so you’ll determine if this is due a software problem, or a hardware malfunction. As we always suggest, make sure to observe the phone for some time after a factory reset so you’ll notice the difference. Of course, you don’t want to install anything during the observation period. If the problem remains during the observation period, find a way to have the phone replaced.


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