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What to do with Samsung Galaxy S7 Edge that shows “message could not be sent” error when texting [Troubleshooting Guide]

Text messaging issues are among the most common reports we received from our readers. Many of them occurred after an update while some happened without apparent reason at all. The thing about these issues is that they might be just a minor problem with the app, the settings or the firmware itself. Unless your phone cannot receive signal from your provider’s tower, then it would never be a problem with the hardware.

In this post, I will tackle a texting issue that keeps showing the error “message could not be sent.” The subject of our troubleshooting would be the Samsung Galaxy S7 Edge, which according to its owners, has been updated a couple of months ago. We may be able to provide a solution to this problem in this post so if you’re one of the owners who got an issue like this, continue reading below as you might this article helpful.

But before anything else, if you have another issue with your phone, drop by our S7 Edge troubleshooting page as we have already addressed hundreds of issues reported by the owners. Odds are that there are already existing solutions on our website or at least, there are similar problems we already fixed. So, try to find ones that are similar or related to your problem. If you need further assistance, however, feel free to contact us by filling up our Android issues questionnaire.

How to troubleshoot your Galaxy S7 Edge that shows error when sending texts

Problem: I have an S7 Edge unlocked phone and I’m using Straight Talk as my provider. But ever since I got a security update 2 months ago everytime I send a regular text message I get a message back saying “message could not be sent” yet everyone does get my text. So, I get the error message for no reason. Straight talk says it’s not on their end so it must be my device that’s screwed up. I’ve tried all the easy answers like force stop the app cleared the data. I rather not do a factory reset but if you think that’s my only issue then I guess I will. Well let me know what you think. Thanks!

Troubleshooting: Well, based on the symptom your phone is showing, it seems like this is just a minor issue as the text messages are actually sent but you’re still getting the notice that they weren’t. It might be a glitch or caused by some corrupt caches.

So, what we have to do now is to isolate the problem by doing the basic troubleshooting procedures to determine what is really happening with your phone. Try to follow our troubleshooting steps below…

Step 1: Perform the Forced Reboot procedure

As I said earlier, this might be just a glitch and it may not require us to do some complicated procedures to fix. So, the first thing I want you to do is the Forced Reboot. It’s actually just like a reboot that normally do from time to time, the only difference is it does refresh your phone’s memory as it simulates the battery pull procedure we often do to phones with removable batteries.

  1. Press and hold the Volume Down and Power keys together for 7 to 10 seconds.
  2. The device will then reboot.

After the method try to send a text message (SMS) to see if the error message still pops up. If so, you can move to the next step.

Step 2: Boot your phone in Safe Mode and send a text

Since, we are not certain what the issue is, this time we have to rule out the possibility it’s caused by a third-party apps by booting the device in safe mode. In this environment, all downloaded applications will be temporarily disabled. After successfully running your device in this mode, try to send a text message to your contacts or to your own number just to know if the error still shows up.

Here’s how you boot your S7 Edge in safe mode…

  1. Turn the device off.
  2. Press and hold the Power key past the Samsung Galaxy S7 edge screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

If the error still shows up in this mode, then move on to the next step but if not, then it’s clear enough there’s an app that’s causing the problem. If you don’t have a clue as to which of the apps you installed is causing it, I suggest you update the apps that need to be updated…

  1. From any Home screen, tap the Apps icon.
  2. Tap Play Store.
  3. Tap the Menu key and then tap My Apps. To keep your apps automatically updated, tap the Menu key, tap Settings, and then tap Auto-update apps to select the check box.
  4. Choose one of the following options:
    • Tap Update [xx] to update all applications with updates available.
    • Tap an individual application and then tap Update to update a single application.

If you already suspect an app or two, try clearing their caches and data first and if that won’t work, try uninstalling them. The same goes for third-party message apps.

How to clear apps caches and data on Galaxy S7 Edge

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Applications.
  4. Tap the desired application in the default list or tap Menu icon > Show system apps to display pre-installed apps.
  5. Tap Storage.
  6. Tap Clear cache.
  7. Tap Clear data and then tap OK.

How to uninstall applications from the Galaxy S7 Edge

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Applications.
  4. Tap the desired application in the default list or tap Menu icon > Show system apps to display pre-installed apps.
  5. Tap Uninstall.
  6. Tap Uninstall again to confirm.

Step 3: Delete the System Cache Partition

As you’ve said that you already do the reset on the messaging app but the issue is still happening, there is a possibility that the system caches had been ruined and caused conflict to the system. In this case, we will delete all temporary files in the cache partition so that new files will be created. Don’t worry as this procedure is safe to do…

  1. Turn off the phone.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 Edge 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 wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

The phone will rebuild the caches so it may take a little while to successfully boot up but once it becomes active, try sending a text message to your number just to know if the error still shows up and if the message is received. Assuming the problem still persists, you have no other choice but to do the next step.

Step 4: Master Reset your phone

Take note, you can do the reset if all procedures you performed haven’t resolved the problem. This will bring the device back to its factory settings, meaning, all files and data stored in the internal storage will be erased. So, before you follow the steps we recommend you to create a backup by transferring all of it to your SD card or Personal computer. After the backup, try to follow these steps first to disable the Factory Reset Protection on your phone so that you won’t be locked out.

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Cloud and accounts.
  4. Tap Accounts.
  5. Tap Google.
  6. Tap your Google ID email address. If you have multiple accounts setup, you will need to repeat these steps for each account.
  7. Tap Menu.
  8. Tap Remove account.
  9. Tap REMOVE ACCOUNT.

Then, follow these steps to reset your phone…

  1. Turn off your Samsung Galaxy S7 Edge.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 Edge 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.

I hope after you perform all these methods the issue will be fixed.

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