AT&T messaging app on Galaxy S7 fails to send SMS, other issues

Do you have a #GalaxyS7 or having an issue with it? This material may help you. Read on.


Below are the specific topics we cover in this material today:

  1. AT&T Galaxy S7 SMS issues | AT&T messaging app on Galaxy S7 fails to send SMS
  2. Galaxy S7 is unresponsive and won’t turn on
  3. Galaxy S7 error pops up when charging
  4. Galaxy S7 bootloop issue

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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: AT&T Galaxy S7 SMS issues | AT&T messaging app on Galaxy S7 fails to send SMS

This is extremely frustrating. “Usually” my text messages go through without issue, but occasionally they don’t.  I like and use the AT&T Messaging App because it is a free app that provides one-stop access to voicemail and texts. I don’t know if the issue is with the specific app or not. Within days of its release, I returned to Best Buy to have the Samsung and AT&T support people take a look. The Samsung people had me first go to the AT&T support people, who got on the phone with someone from AT&T and they reset connections (they did not factory reset the phone). I was told it should work again and 15 minutes later it did work… but only intermittently. 

Basically, messages I am trying to send will hang intermittently. When the phone works properly and I send a message, the message will briefly appear on my screen in italics with the orange “thinking” circle before changing (within a fraction of a second) to the standard form of a sent message (no circle, no italics).  When it hangs, it will appear in italics with the circle swirling, sometimes for two hours or more! 

It has hung, intermittently, in the following scenarios:

  • Sending long texts to one recipient (most frequent cause)
  • Sending a photo (another frequent cause)
  • Sending a group text no matter how long or short (medium-frequent cause)
  • Sending short texts to one recipient in rapid succession (less-frequent)
  • Sending a single, very short text to one recipient (least frequent cause, but it has hung this way before).

I rarely use emojis so many of the texts mentioned above are SMS, vice MMS.  If long texts use MMS (vice SMS – you tell me), then I would say the majority of hang-ups (but not all the time) are MMS texts.

When it hangs, the app does not let me select the text. So, if I’ve just spent 2 minutes preparing a long text and it hangs unexpectedly, I’m stuck either writing it again or waiting for it to either go through or give me an error saying it couldn’t be sent. Sometimes this happens quickly (within a few minutes) but usually it takes about 2 hours to give me the error (it rarely goes through on its own once it hangs, but sometimes it will). 

Things I have tried doing to make the text message go through after it’s hung include the following and offer a cumulative success record of about 15%:

  • Closing the messaging app and re-opening it
  • Closing all apps and reopening the messaging app
  • Restarting the phone
  • Turning off wifi
  • Leaving the area (and presumably hitting a different cell tower?)
  • Sometimes when one message hangs (e.g., a long message), I can successfully send a short message immediately afterward. Sometimes (albeit rarely), doing so will make the longer message go through. Sometimes all messages hang and I get six or more swirling circles taunting me.

I have good cell coverage/bars on my phone at all times where I live and work.

I have not yet returned to Best Buy to have the wireless support and Samsung people help me; that always takes a considerable amount of time and I have a newborn baby that does not make this easy. I also am not looking forward to resetting my phone to factory settings, which may be what is required based on the conversations when I went in shortly after the phone was first released.  I keep hoping that either an app or system update will magically fix the issue.

I’ve seen your article that describes a similar problem here and I’ve done what I can:

My thought is, the above article is probably for issues that always repeat, right? This intermittent problem occurs probably 20% of the time when I try to send a text message. 

I would really appreciate any help you can provide!!!!

Cheers. — Chris

Solution: Hi Chris. First of all, we want to make it clear that any SMS-related issue is best addressed by your network operator rather by any third party like us. This is especially true in your case since it appears the problem also involves using an AT&T-supplied messaging app. The solutions we provide in our blog for SMS issues always work in the assumption that the cause may be resolved by doing basic software solutions. These solutions are ineffective if the cause of the trouble is due to poor coding. This means that the solutions we provide may not work in your case if the problem is caused by a bad app or glitchy firmware in the first place. Such an issue can only be fixed by the corresponding developer, in your case, AT&T. No amount of factory reset will work in your favor if the messaging app itself is poorly built.

Now, you may wonder how you’ll know if the messaging app is bad. Well, it’s simple. Try a different messaging app or use the stock Samsung messaging app. If you don’t want to use Samsung’s messaging app, try one of the many free messaging apps from Google Play Store. Many offers the same basic functionalities AT&T messaging app provides so you will not miss much. If the symptoms you mention above won’t occur in another messaging app, that’s a confirmation that AT&T’s app is problematic.

Another point we would like to emphasize here is the possibility that the issue may be network- or account-related. What that means is that AT&T’s network may be causing the errors in your phone or app. To check, try inserting your SIM card to another device and see how SMS functionality works. If the issues continue even on another device, that’s further proof that AT&T’s system is to blame.

Finally, don’t hesitate to do a factory reset. There’s nothing much an average user can do when it comes to an issue like this. Before you consider getting a phone replacement, try to see how SMS works after a factory reset. In case a third party application is creating a conflict with the messaging app or operating system, we also suggest that you don’t install any app after a factory reset right away. Just try to observe the phone for at least 24 hours without any apps.  This will give you an idea whether or not an app you’ve installed before is the source of all these hassles.

For reference, here are the steps on how to perform a factory reset on your S7:

  • 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.

Problem #2: Galaxy S7 is unresponsive and won’t turn on

Samsung S7 was fully charged. Turned on normally but got stuck in start up screen with blue light on permanently. Phone had a black screen and would not respond or turn off so had to let the battery die as you can no longer physically remove it.  (Took it to the Bell store and they tried holding down the home, power and volume keys but it didn’t work). It wouldn’t charge or start again the next day.

Took it to  Samsung Repair and they agreed it had to be sent in but I would lose all my data (only a month’s worth but some important photos are in there that I want to save and no they were not backed up). Now, 4 days after this issue occurred it has decided to charge and at first turned itself on, then it turned itself off again but is still charging. The phone is just over a month old and Bell only gives a 30 day warranty, it started this at day 31! It can be repaired for free by Bell or Samsung but the issue is I really need to get those photos before I send it for repair as they will wipe the whole phone. — Teresa

Solution: Hi Teresa. Your options when it comes to an issue like yours are very limited. Your only chance of recovering your files is to hope that your phone can boot to other modes like safe mode or recovery mode.

The first thing that you want to do is to see if your S7 can boot in safe mode, also known as diagnostic mode. Enabling safe mode is usually recommended if a user wants to check if a third party application is causing a problem. In your case though, you would like to see if your phone will respond to a different hardware button combination so that you can recover your data. To boot in safe mode, follow the steps below:

  • 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.

If your phone won’t respond to the hardware button combination to boot in safe mode, try to see if you can boot the phone up in recovery mode. We know the store staff may have already tried it but we still recommend that you do it yourself for several tries. If you’ll be successful, a simply cache partition wipe may fix your problem. To boot into recovery mode, follow these steps:

  • First make sure that the phone is completely off (this can be indicated by the absence of LED light or sound) by doing a soft reset. You can do that by pressing and holding both Power (located on the right edge) and Volume down buttons (located on the left edge) for 12 seconds. If your phone won’t respond, you can assume that it’s off.
  • Make sure that you leave the phone charged for at least 30 minutes before you proceed.
  • 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.

If your phone will boot up in recovery mode, make sure that you clear the cache partition. After doing so, you can then reboot the device.

However, if the phone remains unresponsive, screen remains dark, and no sound or vibrations are produced, that’s a confirmation that you must have a hardware problem at hand. You have no other choice in this situation but to get a phone replacement. Obviously, file recovery is out of the question in this case as well.

Problem #3: Galaxy S7 error pops up when charging

Unfortunately, stopped

This error pops up when i plug the phone to charge. It doesn’t matter whether I use the  original charger, car charger (aftermarket), power bank.

After clearing cache, it does the same thing.

Thank you for your effort.

Bonus: After restarting the phone (when asks for phone PIN (not SIM PIN) even if i type the correct phone security PIN, it says incorrect PIN. After typing the same correct PIN again it works.

Recently the same error occurred with mobi music player. It was installed after initial security error. might be related to phone restart and open apps. — Ruslan

Solution: Hi Ruslan. If wiping the cache did not work, we suggest that you proceed with factory reset, especially that you are now having a similar issue with another app. There may be a firmware glitch causing some apps to not work properly. Kindly refer to the steps on how to perform a factory reset above.

Problem #4: Galaxy S7 bootloop issue

Hi. My samsung S7 is having problems with starting up. it’s on a boot cycle. I’ve checked the charger with another phone and it’s fine so i know it’s not the issue. When i plug in the charger, press the power button, it shows me the battery sign for 2 seconds and then shuts off…or it will just vibrate for 2 seconds like its turning on but then shut off.

Could you please tell me what the problem could be with it? I was told it’s not a USB port issue either.

Please let me know if you need anymore information from me.

Any feedback or instructions on how to fix it, would  — Asma

Solution: Hi Asma. Like you, there’s no way for us to know exactly what the problem is. You must do some troubleshooting yourself so you’ll be able to isolate where the fault lies. Like what we tell Teresa above, your options when dealing with this kind of problem is nil. The cause of the problem can range from a bad app, firmware glitch, to a hardware malfunction somewhere. Make sure you try our suggestions above.

And speaking of hardware issues, the true cause can vary as well. A technician must run a wide range of physical checks in order to know which component may have failed. The most common point of failure that leads to an issue like this is a bad USB port, usually due to wear and tear from plugging and unplugging ritual during charging. We don’t know how the person who told you it’s not a USB port issue arrive at the idea but it still worth checking. Our blog does not provide hardware troubleshooting though so we suggest that you bring your phone to a Samsung repair shop so it can be checked.


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