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Galaxy J7 can’t send email over wifi, can’t move apps to SD card, other issues

Welcome to another #GalaxyJ7 post. We’re bringing you 11 more issues and solutions related to Galaxy J7 so we hope that this material will be helpful for our community.

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 J7 flickering screen issue

Hi. My name is Atul Mishra. I use Samsung Galaxy J7. before few months my phone’s screen started flickering but days after that it stopped flickering automatically. It happened again continuously for one month then it stopped flickering again. I went to service center and they told me that it’s happening because of water. somehow my phone has absorbed moisture. They told me to change the motherboard but I did not go for it. few days after that it stopped flickering again. Sometimes I noticed that it is flickering because I install some apps like kik and 4Chat but after uninstalling that app it’s not stopping flickering. Sometimes it happens because of software update. Please fix my issue. Thanks. — Atul

Solution: Hi Atul. First off, the presence of water or moisture can result to permanent hardware damage. If your phone got wet or exposed to water before the flickering issue started, stop looking for solutions. You must either follow what the service center told you to replace the motherboard, or simply have a new phone. Moisture in the motherboard almost always lead to corrosion so you’ll still end up with a defective phone in the future.

Secondly, if you are 100% positive that your phone was never exposed to water before, the cause of the problem may still be bad hardware. To check if that’s the case, do a factory reset and let the phone run without any apps installed for a few days. If the flickering screen problem continues, that’s indicative of a hardware issue. You must send the phone in for repair or replacement.

If the flickering issue won’t occur after a factory reset and during the observation period of a few days, an app may be causing it. To identify the problematic app, make sure to install apps one be one so you can observe if the issue returns after every installation.

For reference, here are the steps on how to factory reset your J7:

  1. Create a backup of your important files such as photos, videos, contacts etc. You can use Smart Switch for this task.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  4. When the device logo screen displays, release only the Power key
  5. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  6. Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  7. Press Power button to select.
  8. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  9. Press Power button to select and start the master reset.
  10. When the master reset is complete, ‘Reboot system now’ is highlighted.
  11. Press the Power key to restart the device.

Problem 2: Galaxy J7 can’t make calls using an app when mobile data is enabled

Hello. I got your id from internet.  i am facing a problem with my new J7 mobile.

i am able to use internet by using data connection, but among all the software i am not able to use one calling application, which is itel dialer and not able to make call by using this.

On wifi connection there is no problem and on data connection it is not working.

the same app i installed on another 6 or 7 android mobiles and it is working very well on data connection.

i have updated my device software, but there is no use.

my back ground data restriction also disabled for this. Kindly advice. Regards. — Joseph

Solution: Hi Joseph. This is an app-specific question and it can only be checked by the developer. There may be a compatibility issue preventing the app from working in a J7 device. If you’ve already tried the usual app cache and data wipe troubleshooting, make sure to contact the developer of such app for support.

Below are the steps on how to wipe an app’s cache and data:

  1. Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  2. Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6 or 7.
  3. Once in there, click on an application.
  4. You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  5. You should now clearly see the Clear Cache and Clear Data buttons for the application.

Problem 3: Galaxy J7 mobile data won’t turn off when SIM card is inserted

Hi! I just bought a Samsung Galaxy J7, and it is causing problem with its mobile data.

Just after I inserted the SIM, the mobile data automatically turns on but I can’t use it. And when i turn off the data from the settings the data icon in the notification panel doesn’t goes away, it stays. It shows ‘H’ symbol without any sending or receiving signals. I restarted it but, the symbol on the notification panel stays on, even though the option is turned off. Even on turning on it doesn’t work, I have data of about 100MB. Solution is appreciated. — Towhidur

Solution: Hi Towhidur. There may be an operating system glitch behind this issue so the first thing that we would like you to do is factory reset.

Sometimes, a corrupted system cache can lead to all sorts of problems so if you don’t want to do a factory reset right away, you can try to wipe the cache partition first. Here’s how:

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the device logo screen displays, release only the Power key
  4. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  5. Press the Volume down key several times key to highlight ‘wipe cache partition.’
  6. Press the Power key to select.
  7. Press the Volume down key to highlight ‘yes’ and press the Power key to select.
  8. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  9. Press the Power key to restart the device.

In case the issue is due to a third party app, you can also try to observe the phone while it’s running on safe mode. Like the cache partition wipe, you can do this before performing a factory reset. To do that, follow these steps:

  1. Turn the device off.
  2. Press and hold the Power key past the screen with the device name.
  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’.

Safe mode blocks third party apps. If mobile data works normally with your SIM card inserted, that’s an indication that a third party app is causing it. Uninstall app until you’ve identified which of them is the culprit.

Problem 4: Galaxy J7 screen flickering at different brightness levels

Sir, i have Samsung Galaxy J7. my device has no problem but since some days the screen of my mobile start flickering. i don’t know why it happens.  I am very much worried about it. half of the screen starts blinking at low brightness. When i increase the brightness, the screen show no flickering but after few hours a slight flickering again started at that brightness level. kindly help me and guide me what to do. — Rabail khan

Solution: Hi Rabail khan. We’ve noticed a flickering issue on some Samsung devices before but they can be attributed to a bug in auto-brightness feature. Yours looks like a hardware issue though so the only troubleshooting step that we can suggest is factory reset (steps provided above). Once you’re performed a reset, let the phone run for 24 hours without apps so you can observe how the screen works. If the flickering problem remains, there may be an issue with the screen assembly. To fix that, you need to have the screen replaced.

Problem 5: Galaxy J7 hardware buttons stop working when the screen turns off

Phone type – Samsung Galaxy J7.

My phone’s power button, volume button and home buttons are not working. when I take out the battery and re- install it, the screen works and even keyboards are working. Then when screen light goes off it doesn’t works as none of the buttons are working. how to fix this?

Day before the phone went off i have connected my phone to car through bluetooth and played music almost for ten hours while i was travelling.but bluetooth is off now.please give me solution.is it a software problem or what? My phones software is upto date. — Kezang Jamtsho

Solution: Hi Kezang Jamtsho. Like Rabail above, you must do a factory reset first to know if it’s a software or hardware issue. Make sure that you observe the phone for a day after a factory reset (no apps installed). If you’ll get the same problem, you must have a hardware problem. You have the phone repaired or replaced.

Problem 6: Galaxy J7 flickering screen issue after repair

Good eve! I bought a Samsung Galaxy J7 last January 2015 and 1 month after i bought it, my phone screen is flickering when i turn off my screen light. So i decided to bring my phone to Samsung gadget care due to warranty. They fixed my phone and they told me that they changed the LCD. Last month, my phone keeps on flickering again. I already tried soft and hard reset but still same result. What would be the problem on my phone? They already change the LCD but still it keep on flickering.. Hope you could help me.. Thank you in advance…. God bless. — Rogelyn

Solution: Hi Rogelyn. Please refer to our suggestions for others who have similar issue. If nothing will change after you factory reset the device, bring it back to Samsung for another repair. LCD malfunction is rare and it is usually caused by damage from misuse — dropping a phone, exposing it to water, putting the device near a heat source, etc. We seldom hear of malfunctioning screen due to a software problem or bug so if your phone suffered any physical damage before, there may be a motherboard problem causing the screen to appear to flicker. If possible, ask Samsung to give you information about the repair and cause of the problem so you can prevent the issue from happening again.

Problem 7: Galaxy J7 takes a long time to type SMS for one contact

When texting only one contact it takes a very long time for everything to load. Sometimes i will even type a full message without anything coming on the screen. I can feel the vibration from pushing the buttons but nothing comes up. Sometimes it will put a few words on thw page other times it will back out completey. I dont understand why it only happens to one contact. — Jsmittle90

Solution: Hi Jsmittle90. Make sure that you wipe the cache and data (in this order) of all the apps involved when typing a message — messaging app, keyboard app, and Contacts app.

  1. Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  2. Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6 or 7.
  3. Once in there, click on an application.
  4. You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  5. You should now clearly see the Clear Cache and Clear Data buttons for the application.

If wiping the cache and data of said apps won’t fix the problem, do a factory reset.

Problem 8: Galaxy J7 wifi keeps dropping

When connected to WiFi it will drop the connection and I have to scan and connect again. multiple times. My husband has the same phone and his phone stays connected.

Also Google Play Store opens by itself and I have found no adware. I have had the phone for 6 days – problem from the start but my service provider says they find nothing wrong with it. — Nelmari

Solution: Hi Nelmari. First of all, it’s not normal for Android to open an app like Google Play Store by itself. There must be something causing it. It can be a bug or a malware.

Secondly, what you want to do right now is to ensure that you start from scratch so you can then observe if wifi works normally when there are no apps installed, and if the Play Store will pull itself up without any user intervention. Do a factory reset and see what happens. If the situation won’t change, have the phone replaced.

Your second issue may be due to a bug with the app itself so you want to make sure that Google Play Store app is updated after you factory reset the phone. Be sure to allow it to install updates automatically to keep the rest of your apps updated as well.

Problem 9: Galaxy J7 not receiving incoming calls

Hello. I have a brand new Galaxy J7 2016. I am not receiving incoming phone calls. I have taken the phone to the AT&T store, which wouldn’t touch it since it is an international unlocked phone. I called customer service which disconnected me and reconnected me to the network. I have taken out the SIM card, taken out the battery, did a soft reset, and updated the APN settings. Is there anything else I can do? Thank you for your time. —         Victoria

Solution: Hi Victoria. There a few things that you need to check to identify the cause of your problem. Since you never bothered to give us a history of what happened prior to noticing the problem, our suggestions may not be extensive.

Is the phone unable to receive incoming calls from one contact or multiple contacts? If you’re having a problem with a single contact only, make sure to check if you’ve accidentally blocked the number. If you’re not sure, simply delete the contact and add it again afterwards.

If you happen to have issue with multiple contacts or all callers, try to wipe the cache and data of your Phone app first (steps provided above).  Once you’ve done that, make sure that you delete all your contacts from the phone and re-add them. An efficient way to do that is by creating a backup of your contacts first using Samsung Smart Switch app.

Is call barring enabled on your account or device?

We don’t know much about your particular phone model so you have to contact your carrier to ensure that your account is permitted to receive a call. Since you’re on AT&T, which is a GSM network, try to insert your SIM card to another device and call it. If you’ll be able to call it on a second device but not on the first one, that means that there’s an issue with your J7. Try to factory reset it to restore all software settings back to defaults.

If, on the other hand, you will still be unable to call your number when your SIM card is inserted in another device, the issue must be account specific. Let AT&T know about it so they can check further, or simply replace your SIM card.

Problem 10: Galaxy J7 can’t send email over wifi

Hi. My Samsung J7 can receive emails with no problem at all. If i want to send emails i have to switch my wifi off and go to my mobile data. Surely, there is something not right. I have been to my vodacom shop several times and when they send emails it works but i figured out its because i am on mobile data. How can this be fixed? I am tired of paying every time they said it’s fixed. Thanks in advance. — Dorish

Solution: Hi Dorish. In most cases, an issue like this is due to authentication problem with an Internet service provider such as the one for your home wifi. ISPs don’t want that their SMTP server will be used for sending junk emails or spam when a device is outside their network. So, they require each and every device to authenticate properly before sending an email and this may be where your issue lies. If you did not enter the Outgoing Server Authentication properly during the setup, your email provider or Internet service provider (if they are one and the same) may be blocking your emails from leaving their network. We don’t usually encounter this problem with popular email services like Gmail, Outlook, Yahoo, etc so we’re assuming you have an email account provided by your carrier. If that’s the case, you must work with them to resolve this issue. Make sure that you ask them for the correct port number to use when setting up your email account. You may also need to use SSL in this case so be sure that you cover that too.

In order to manually enter server settings for your email account, you must choose Manual setup option. If you’re using the built-in Samsung email app, Manual setup option should be available at the bottom part after you’ve typed in your email address.

If you’ll  have the same experience after you’ve reconfigured your email account, continue working with your carrier for a solution.

Problem 11: Galaxy J7 can’t move apps to SD card

Hi Droidguy. I recently bought a Samsung microSDHC Card (memory card)/Class 10/HD compliant which was 32GB and I’m using Samsung Galaxy J7. My problem is the SD card keeps showing up not enough memory whenever I tried to move my apps into external storage. While in storage settings was 170MB used of 31.24GB. Every application that I successfully transferred to SD Card is missing. I had to redownload and reinstall again and again. Please help me solve my problem. Thank you. — Nurul

Solution: Hi Nurul. Not all apps can be moved to external storage. If you don’t find any option to move an app to SD card under Application manager, that means NO. it’s that simple.

However, if there’s an option to move an app to SD card under Application Manager but the phone gives you an error that there’s not enough memory in the card, there may be bug causing it. To fix that, make sure that you try another known, working SD card. If the problem remains, do a factory reset before attempting to move apps again. If the same thing happens on the second SD card, there may be an issue with your phone. In that case, you may be better off by replacing it.


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