How to fix Galaxy M40 MMS won’t send

Are you having trouble with MMS? In this post, we’ll show you what you can do if Galaxy M40 MMS won’t send.

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Galaxy M40 MMS won’t send | MMS not working

There are a number of possible reasons why MMS may not work. If Galaxy M40 MMS won’t send and you’re not sure what to do, follow our suggestions below.

Galaxy M40 MMS won’t send fix #1: Turn on mobile data

When dealing with any MMS problem, the first thing that you want to do is to ensure that your device has cellular connectivity. MMS won’t work when there’s no internet connection, when using wifi, or when mobile data is off. Make sure that you enable mobile data first before you attempt to send MMS once again. If you’ve already done that and the problem returns, follow the rest of the troubleshooting steps below.

Galaxy M40 MMS won’t send fix #2: Check for errors

Is there an error or message that pops up when sending attempt fails? If yes, take note of the error and do a quick Google search about it. Be sure to use the exact wording in your query. If you’re lucky and the error is known, there may be a readily available fix for that.

Errors are some of the ways to help in troubleshooting problems. If you can’t find any relevant source or information online, continue with the suggestions below.

Galaxy M40 MMS won’t send fix #3: Reset network settings

If your Galaxy M40 MMS still won’t send at this point, your next move is to ensure that your device has all the correct network settings. This is one of the basic things to do for any network trouble. Most texting problems have settings issue as root cause. Here’s how to reset your network settings:

From the Home screen, swipe up on an empty spot to open the Apps tray.
Tap General Management.
Tap Reset.
Tap Reset network settings.
Tap Reset settings.
If you have set up a PIN, enter it.
Tap Reset settings. Once complete a confirmation window will appear.

Galaxy M40 MMS won’t send fix #4: Perform forced reboot

If mobile data is working but the problem stays at this time, it’s not a bad idea to continue troubleshooting the issue by doing a system restart. We suggest that instead of doing the regular restart, a forced reboot is attempted. While restarting your M40 normally should be fine, it’s better if you can simulate the effects of a “battery pull,” also known as soft reset. This clears the RAM so if a temporary bug is tied to the current Android OS session, this might help. In older Galaxy S devices, this type of restart is easily done by removing the battery. Since the Galaxy M40 does not have a removable battery pack, you want to do a combination of hardware buttons to restart it. To do that, simply press and hold the Power and Volume Down buttons for about 10 seconds. Once the phone has restarted, release the buttons.

For some Galaxy M40, there may be a slightly different way to arrive at the same method. Here’s how:

Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Allow several seconds for the Maintenance Boot Mode screen to appear.
From the Maintenance Boot Mode screen, select Normal Boot. You can use the volume buttons to cycle through the available options and the lower left button (below the volume buttons) to select. Wait for up to 90 seconds for the reset to complete.

Galaxy M40 MMS won’t send fix #5: Force quit messaging app

Closing problem apps is usually effective if the cause is due to minor bugs. Make sure that you restart the messaging app first to see if this works. This is how it’s done:

On your screen, tap the Recent Apps soft key (the one with three vertical lines on the left of the Home button).
Once the Recent Apps screen is shown, swipe left or right to look for the Instagram app. It should be here if you managed to run it previously. Then, swipe up on the app to close it. This should force close it. If it’s not there, simply tap the Close All app to also restart all apps.

Another way to force close an app is this:

Open Settings app.
Tap Apps.
Tap the More settings icon (three-dot icon, upper right).
Tap Show system apps.
Find and tap the appropriate app.
Tap Force Stop.

Galaxy M40 MMS won’t send fix #6: Clear app cache

Another way to directly deal with the app is by clearing its cache. Delete the cache of your Instagram app with these steps:

Open Settings app.
Tap Apps.
Tap the More settings icon (three-dot icon, upper right).
Tap Show system apps.
Find and tap the appropriate app.
Tap Storage.
Tap Clear cache button.

Galaxy M40 MMS won’t send fix #7: Reset / reinstall app

If the problem continues and Galaxy M40 MMS still won’t send, try to delete the messaging app’s data. This will reset all its settings and return the app to its factory state. This is usually effective if the bug is due to an app update.

To clear an app’s data:

Open Settings app.
Tap Apps.
Tap the More settings icon (three-dot icon, upper right).
Tap Show system apps.
Find and tap the appropriate app.
Tap Storage.
Tap Clear data button.

If you’re using a messaging app that’s not part of the preinstalled app package, which means it was not there when you first set the phone up after unboxing, then you need to reinstall it instead of clearing its data. To uninstall an app:

From a Home screen, swipe up or down from the center of the display to access the apps screen.
Open Settings app.
Tap Apps.
Ensure All is selected (upper-left). If necessary, tap the Dropdown icon (upper-left) then select All.
Locate then select the appropriate app. If system apps aren’t visible, tap the Menu icon (upper-right) then select Show system apps.
Tap Uninstall to delete an app.
Tap OK to confirm.

Galaxy M40 MMS won’t send fix #8: Clear cache partition

Some forms of texting issues are caused by bad system cache. This can happen after a system update or sometimes, app installation. Android depends on a set of temporary files called system cache to load apps quickly. If this cache gets corrupted or outdated, a device may suddenly lag, freeze, or show signs of slow performance. At other times, uncommon glitches may occur as well as overall performance of the system may also be affected. To ensure that your M40 has good system cache, we suggest that you clear it once every few months. Here’s how to do it:

Turn off the device.
Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
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).
Press the Volume down key several times to highlight ‘wipe cache partition’.
Press Power button to select.
Press the Volume down key until ‘yes’ is highlighted and press the Power button.
When the wipe cache partition is complete, “Reboot system now” is highlighted.
Press the Power key to restart the device.

Galaxy M40 MMS won’t send fix #9: Install updates

At this time, installing an update is a good idea. Updates not only bring changes externally but also fixes to known bugs. If the problem is caused by inefficient carrier coding in the firmware, an update may fix it. Be sure to check for updates to both apps and OS.

Galaxy M40 MMS won’t send fix #10: Check on Safe Mode

If your Galaxy M40 MMS stopped working after you installed a new app, that can be due to a third party app. Try to delete it and see what happens.

Other apps may sometimes interfere with Android and with other apps. To check if that’s the case, restart the phone to safe mode. Here’s how to do that:

Press and hold the Power button until the Power off window appears then release.
Touch and hold Power off until the Safe mode prompt appears then release.
To confirm, tap Safe mode.
The process may take up to 30 seconds to complete.
Upon reboot, “Safe mode” appears in the lower-left of the home screen.

Remember that third-party applications are disabled in this mode so what you can use are pre-installed apps. If MMS starts working on safe mode, that means that the problem is due to a bad app. Uninstall the app you recently installed and see if that will fix it. If the problem remains, use the process of elimination to identify the rogue app. Here’s how:

Boot to safe mode.
Check for the problem.
Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added.
After you uninstall an app, restart the phone to normal mode and check for the problem.
If your M40 is still problematic, repeat steps 1-4.

Galaxy M40 MMS won’t send fix #11: Delete messages

Both incoming and outgoing texts and MMS use the same inbox in your messaging app. Each app is given a finite amount of space to use so if you text or use MMS a lot, it’s possible that the reason why MMS won’t send at this time on your Galaxy M40 is due to lack of space. Try to delete old conversation threads, especially those that contain a lot of media or MMS and see if that will help.

Galaxy M40 MMS won’t send fix #12: Reset app preferences

Some apps require that a certain default or system app is working. To make sure that all default apps are up and running, you can reset app preferences with these steps:

Open Settings app.
Tap Apps.
Tap on More settings at the upper right (three-dot icon).
Select Reset app preferences.
Restart your Galaxy M40 and check for the problem.

Galaxy M40 MMS won’t send fix #13: Factory reset

The final solution that you can do on your device is factory reset. This is usually effective in fixing problems caused by incorrect software settings or bad apps. After a factory reset, all software settings will be returned to their defaults. If you haven’t tried this yet, be sure to do so. Also, make sure to create a copy of your personal data before a factory reset to avoid losing them.

Below are the two methods to factory reset your Galaxy M40:

Method 1: How to hard reset on Samsung Galaxy M40 via Settings Menu

Create a backup of your personal data and remove your Google account.
Open Settings app.
Scroll to and tap General management.
Tap Reset.
Select Factory data reset from the given options.
Read the information then tap Reset to continue.
Tap Delete All to confirm action.

Method 2: How to hard reset on Samsung Galaxy M40 using hardware buttons

If possible, create a backup of your personal data ahead of time. If your problem prevents you from doing that, then simply skip this step.
Also, you want to make sure that you remove your Google account. If your problem prevents you from doing that, then simply skip this step.
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.
Press and hold the Volume Up button and the Bixby button at the same time.
While still holding the Volume Up and Bixby keys, press and hold the Power button.
The Recovery screen menu will now appear. When you see this, release the buttons.
Use the Volume Down button until you are highlighting ‘Wipe data/factory reset.’
Press the Power button to select ‘Wipe data/factory reset.’
Use Volume Down to highlight Yes.
Press the Power button to confirm factory reset.

Galaxy M40 MMS won’t send fix #14: Contact your carrier

Asking help from your network operator must be done if none of the above suggestions help. If Galaxy M40 MMS still won’t send at this point, the cause must be account- or network-related.

If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem.

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How to fix Galaxy M40 MMS won’t send | MMS not working