How to fix Galaxy J7 Pro texting issue: keeps showing “Not registered on Network” error, texting and calling not working

Many #GalaxyJ7 and #GalaxyJ7Pro users are contacting us for solutions everyday so today’s post will answer some of them. We hope you’ll find the solutions fix your own issue.

Problem #1: How to fix Galaxy J7 Pro texting issue: keeps showing “Not registered on Network”  error, texting and calling not working

I have Samsung J7 Pro and been a week since it kept saying “Not registered on Network” when i tried to call and message, but it allows me to use only internet. I tried to search  network manual, i tried to set the network APN and select it, i reset my phone to factory mode, i take out the sim and insert it and each time it’s the same. P.S the sim works with other phone. 

Solution: When you say internet is working, are you using cellular or mobile data connection or wifi? If the internet connection you are referring to is wifi only, that means that may be a problem with device’s network function.

If, on the other hand, mobile data is working but not the text messaging and calling functions, there may be an app blocking these missing capabilities. Try to restart the phone to safe mode and check for the problem. In safe mode, all third party apps will be suspended so if everything works normally, that’s a clear sign of an app trouble.

These are the steps to restart your phone to safe mode:

1. Turn the device off.
2. Press and hold the Power key past the model name 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.
8. Check for the problem.

If you J7 Pro can send and receive texts and can call, one of the installed third party apps is to blame. To identify which of your apps is causing the trouble, you should boot the phone back to safe mode and follow these steps:

1. Boot to safe mode.
2. Check for the problem.
3. 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.
4. After you uninstall an app, restart the phone to normal mode and check for the problem.
5. If your J7 Pro is still problematic, repeat steps 1-4.

If there’s no change in safe mode though, the best people that can help is your carrier’s technical support team. They have access to your account details and history and if the phone came from them, it’s history too. Make sure to provide all the necessary information to them especially the things that you did differently before noticing the trouble.

Problem #2: Galaxy J7 keeps showing no mobile network available, signal keeps disappearing

Galaxy J7 won’t reconnect to 3G or 4G. After leaving Wi-Fi range says no mobile network available, but there is mobile network available. Sometimes there are 4 bars showing but it still says no mobile network available. usually a restart helps Cannot text over Wi-Fi. I have done the reset where i press the volume down button and the power button to simulate a battery removal several times.

Solution: There may be a network bug causing this problem so the first troubleshooting step to try is clearing the device’s network settings. Here’s how:

1. Open Settings app.
2. Tap General management.
3. Tap Reset.
4. Tap Reset Network settings.
5. Tap RESET SETTINGS button to confirm.
6. Restart your J7 and check for the problem.

Sometimes, clearing a device’s system cache may also help in fixing network troubles. Be sure to do it after wiping the network settings. Follow these steps to do that:

1. Turn off the device.
2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
3. 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).
4. Press the Volume down key to highlight “wipe cache partition.”
5. Press the Power key to select.
6. Press the Volume down key to highlight “yes” and press the Power key to select.
7. When the wipe cache partition is complete, “Reboot system now” is highlighted.
8. Press the Power key to restart the device.

Problem #3: Galaxy J7 won’t boot up after failed update

I have a problem with my Samsung Galaxy J7. I tried to update. After the update installed, it’s stuck on the Samsung logo. I tried the following to no avail: Turn off the device. Press and hold the following three buttons at the same time:Volume Up key, Home key, Power key. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key. When the Android System Recovery screen appears, release the Volume Up and Home keys. Press the Volume down key to highlight ‘wipe data / factory reset.’ Press Power button to select. Press the Volume down key to highlight ‘delete all user data.’ Press Power button to select and start the master reset. When the master reset is complete, ‘Reboot system now’ is highlighted. Press the Power key to turn the restart the device. what can I do?

Solution: If this trouble started after you tried to update normally, that is, via your carrier’s network (OTA), then you need to contact your carrier’s technical support team so they can assist you. In doing so, you are letting them know of the problem (so they can track it and do something about it) and getting official assistance.

On the other hand, if the problem started after you tried to manually install the update via flashing, you should consider flashing back the previous firmware (stock).

Problem #4: What to do if your Galaxy J7 is hacked

My issue may be too personal to be online, do you respond by email only? I’ve been hacked for over a year. Ive been thru 10+ phones, changed emails, phone numbers, etc. My J7 is cloned, only picks up femtocell networks, does what it wants, records audio, video, sends messages, makes calls. I was in a previous abusive relationship and my phone always stores files or my emails, website pop ups pertain to the torment i suffered. It’s a cruel, sick individual. I cant get any help and i dont even know if this will reach you. If you can email me i would greatly appreciate it if not i understand. Thank you.

Solution: If all phones you got end up getting hacked all the time and there’s been domestic abuse involved already, we’re not the ideal party to seek help from. In this situation, you should involve your local law enforcement people in fixing it as there’s obviously nothing that you can do on your end to help yourself. The person doing the abuses to you must be using sophisticated technology to access your new device and penetrate its defenses. We’re here for simple day-to-day Android troubleshooting. We are not equipped to investigate how hacks happen on your devices. Unauthorized device access is almost always a crime in all countries nowadays so you must let the authorities help you in this matter.

Problem #5: Galaxy J7 won’t turn on

Samsung J7. I decided I did not want the 4 digit security pin to open my phone anymore. So I went into security and changed pin to NONE. It was fine – until I charged it (switched off screen)- about an hour later. This morning when I try to switch it on it is dead black screen. I followed your volume/power key instructions but does not work. I have put it on charge and tried volume/power key – does not work. When on charge now it shows a circle with small charge signal in middle of circle. But wont turn on…. Please help – must have something to do with removing security opening pin…? I am not sure what android system it operates on..have put jellybean…but dont know.. Thank you.

Solution: We can’t see the logic of changing the screen unlock option causing your phone to not turn on afterwards. It may just be a coincidence and there may already be a possible underlying reason why your device no longer powers on at this time. Try charging the device using another set of accessories. There may be an issue with the cable or adapter you’re using to charge the phone right now. If that won’t help, try to follow our other suggestions in this post.

 

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