Galaxy Note 4 drops cellular network connection, other connection issues

Note 4

Have you noticed internet issues on your #GalaxyNote4 lately? Our post today may help you fix them. Below are the connectivity issues shared by some members of our community:

  1. Unlocked Galaxy Note 4 does not work in Nigeria
  2. Galaxy Note 4 drops cellular network connection
  3. Galaxy Note 4 keeps disconnecting from Wi-Fi after Android 5.1.1 update
  4. Galaxy Note 4 has choppy Wi-Fi connection

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.


Problem #1: Unlocked Galaxy Note 4 does not work in Nigeria

My phone will not connect to the network. They cannot figure it out. The backstory I bought this phone online and took to my phone store and we tested it out and they put my current SIM in and had no issue making and receiving calls and text on it.

So I sent it to Nigeria to my husband. The carrier there could not get the phone to connect to their network and it was in fact was getting pop up needed a pi code. I had no issue. In fact I made calls and text before i sent it to him. It’s an unlocked phone.

So Husband sent it back to me. I take it to the store and get a SIM for it and get it activated and it would just search for network and do nothing.

I just got off the phone with their tech support and we set up the Access Point Names and all those different access points. They were all blank.

He reset it and sent signal and I can’t get on internet and no network for phone service.

I am at a loss. He said he has done everything and to go back to the Cricket store.

So any direction by you would be greatly appreciated. I have a $550 brand new phone paying $50 for service I cannot use. I am not happy.

Thank you for listening. — Debbie

Solution: Hi Debbie. If unlocking the phone does not allow cellular connection, try checking first if the correct network mode is currently selected. You can check it under by going to Apps>Settings>More networks>Mobile networks>Network mode. Once you have manually selected the type of network that’s working in your area, restart the phone. If the phone will still be unable to connect to a cellular network, try inserting another known working SIM card and do the same process above. If the second SIM card won’t do any difference, do a factory reset. Here’s how:

  • Turn off the Galaxy Note 4 completely.
  • Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
  • When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
  • When the Android System Recovery shows on the screen, release the Vol Up key.
  • Using the Volume Down key, highlight ‘wipe data / factory reset’ and press the Power key to select it.
  • Now highlight ‘Yes — delete all user data’ using the Vol Down key and press the Power key to begin the reset.
  • When the master reset is complete, highlight ‘Reboot system now’ and hit the Power key.
  • The Note 4 will restart but it will be longer than usual. When it reaches the Home screen, then begin your setup.

A factory reset brings the original operating system back to its initial state. This means that if the phone was able to connect to a cellular network after unboxing it before, your Note 4 should be able to do again after a factory reset. The most likely problem should have been the operating system modifications done when you had it unlocked, or when you changed some network settings changed by the store.

Now, the problem with the phone not working in Nigeria may be due to a compatibility issue. Not all carriers have the same frequency band and standards. A phone marketed in the United States may not work with a cellular network in another country because of this. This does not mean that the phone is defective, but simply because the device is not equipped to communicate with the network where’s it’s at. The current cellular chip on the phone does not probably support the network standard in Nigeria. The Nigerian carrier’s tech support should have told your husband about this.

We recommend that your husband buy a phone in Nigeria so he can be sure that it’s compatible with the network in his location.

Problem #2: Galaxy Note 4 drops cellular network connection

My problem started a lot like this post from Kevin:

“I have a Galaxy Note 4 and I am having an issue with it connecting back to the 4G LTE network after connecting to Wi-Fi. After leaving any place I am connected to Wi-Fi,  the mobile data won’t work. I can still make calls and text, but social media and Internet will say it’s not connected.  I can turn airplane mode on and off and that fixes it though. I need help with a permanent fix for this issue. It gets really tiring having to flip airplane mode on and off anytime I leave my house or anywhere I’m connected to Wi-Fi. Thanks! — Kevin”

This was the extent of the problem but then I noticed that I was constantly fighting to make RAM available. My first step was to uninstall all of the apps above and others I found were not helpful — Drawing Lock Screen by Panda.C, Lock screen by secure Solution, Vidio to mp3 Converter by Naing group, EchoMusic by ReverbNation, Lock Master by Qiigame, Cosmic ride Hola Theme, Log long ago hola Theme, spaceship Hola 3D Theme, Hola Launcher.

I then started to focus on freeing up storage on my device. I did a mass dump of the documents on my phone and since then have not been able to connect to 3G/4G. I have done a factory reset already and have improved the issue with my RAM and hard drive storage but have not connected to 3G/4G in days. — William

Solution: Hi William. We can’t see the connection between the phone losing cellular network connectivity and deleting apps (unless the said apps and “documents” are network functions critical). There must be another reason as to why your Note 4 no longer connects to 3G/4G networks.

Start your troubleshooting by making sure that the SIM card is working. Insert it to another smartphone and see if it does connect to 3G/4G.  Alternatively, you can insert a known working SIM card to your Note 4 to verify if it still reads a SIM card properly.

Once you’re positive that the phone reads your SIM card properly, boot it in safe mode to see if a third party application is to blame. To do  that, follow these steps:

  • Turn off the phone completely.
  • Press and hold the Power key and the Volume Down key.
  • When the phone starts to boot, release the Power key but continue holding the Vol Down key until the phone finished restarting.
  • Safe mode will be display at the lower left corner; you may release the Volume Down key now.

If the problem fails to occur when safe mode is enabled, try uninstalling your apps until you have eliminated the cause.

Problem #3: Galaxy Note 4 keeps disconnecting from Wi-Fi after Android 5.1.1 update

I have my Galaxy Note 4 for the last 6 months. It works pretty fine before the update to Lollipop 5.1.1. Before this update, i was using 5.0.1 but after updating my phone to 5.1.1 my Wi-Fi continuously connects and disconnects which create too much problem while live streaming and chatting with friends and downloading apps. So many times i have to close my Wi-Fi and then start my Wi-Fi again.

I have no apps as i have done master reset. Will you please guide me what should i do now?? — Mohsin

Solution: Hi Mohsin. Please make sure that the issue is not on your Wi-Fi. Verify if the same issue is happening on other wireless phones, tablets, or laptop. We don’t want you to troubleshoot the wrong device. If you’re positive that your Wi-Fi is stable and does not randomly disconnect devices, try wiping the phone cache (cache partition), and try to connect again. Here are the steps on how to wipe the cache partition:

  • Turn off the Galaxy Note 4 completely.
  • Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
  • When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
  • When the Android System Recovery shows on the screen, release the Volume Up key.
  • Using the Volume Down key, highlight the option ‘wipe cache partition’ and press the Power key to select it.
  • When the wiping of the cache partition is finished, highlight ‘Reboot system now’ and hit the power key.

Problem #4: Galaxy Note 4 has choppy Wi-Fi connection

My Note 4 has a very choppy Wi-Fi connection. This was a replacement phone that has been a nightmare since I received it. When I got the phone I did the update to 5.1.1 before installing anything. All seemed to work fine so I went ahead and activated it. A few days later I noticed that 4G LTE wouldn’t work. After multiple calls to Sprint and around 50 plus hours “troubleshooting” with them, finally got 4G LTE to work.

However, now my Wi-Fi is sporadic. My wife has same phone on 5.1.1 as well and her device works flawlessly. 80% of the time web pages load slowly and YouTube videos constantly have to buffer. I can put the same video on each device and play at same time only to find hers loading video completely within a few seconds where as my device constantly stops video to buffer.

Please help, extremely frustrated. Have cleared cache, done hard and factory resets, and other steps to try to solve this with no luck. — Chris

Solution: Hi Chris. This is an interesting case but just like any other issue, you have to tinker a few things in order to identify the real cause. While rare, your phone may be suffering from a hardware malfunction. In order to verify that, below are the things that you must do.

Make sure that your phone receives enough bandwidth when playing videos or when surfing

Try viewing YouTube videos or browsing the web on your phone without other devices connected to the network. This is to see if your phone has a problem loading videos even when there’s more than enough internet bandwidth. If the problem fails to occur, make sure to address the network problem, or ask the help of your network administrator remedy the situation.

On the other hand, if the issue persists despite having enough bandwidth proceed to the next potential solution.

Boot your phone in safe mode

If YouTube app is one of the pre-installed apps on your phone, it should still be available when you restart your phone in safe mode. The aim of booting your Note 4 in safe mode is to check if a third party application is causing this trouble. Steps on how to boot your Note 4 in safe mode are provided above.

Seek phone replacement

If you are still unable to identify the cause on your end, there’s a high likelihood that a hardware issue is to blame. If still possible, try to ask for a replacement unit, or have the phone checked.


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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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