Samsung Galaxy Note 4 Network Connectivity Problems

Samsung Galaxy Note 4

Hi avid readers! Here’s another article that may aid you when resolving mobile and WIFI network connectivity issues with your Samsung Galaxy Note 4. These problems are pretty common to an Android user so make the most of it. In the end though, the best resort is to contact the phone’s manufacturer for further assistance.

If you happen to own a Samsung Galaxy Note 4 or any other Android device for that matter, then feel free to reach us using this form or you can also send us an email at [email protected]. Be sure to religiously fill out the form as this will help us gauge the issue your getting and provide an accurate solution as well. We will do our best to respond to every email we receive. 

Problem #1: Samsung Galaxy Note 4 WIFI scans continuously even after turning it off

I have a Samsung Galaxy Note 4 and it looks like the continuous WIFI scanning problem has started after I downloaded and installed the huge fixes which is 677 MB in size. I have turned off all the check boxes, switch, etc. but still no luck. It drains the battery like crazy. At home, ironically, WIFI (relatively weaker signal) still continuously scans. If I charge it to 100% at 10 PM, it goes down to 98% by 7 AM. At work, the WIFI signal strength goes from strong to very strong and the battery goes from say 93% at 8 AM to 50% by 4 PM. I seldom use my Galaxy Note 4 phone and I don’t get that many texts or anything. I use my desk phone mostly. What is the mystery?Pundi

Solution: Hello Pundi. In this case, there are a lot of background running apps which is causing your battery to drain significantly. One culprit is the WIFI app. Have you checked if it is completely turned off? The phone won’t scan for available WIFI networks as long as this functionality is disabled. You can turn WIFI off from the Notification bar at the top of your screen (tap and drag it down). Tap the WIFI icon to turn it on or off. The icon will be green if this feature is activated. Another way is to go under Settings > WIFI and you can slide the bar left or right if you want to turn it on / off. In the event that it would still continue to scan for available networks even if WIFI is switched off, then there is already an issue with the phone’s software. The best way to resolve it is by resetting the phone back to factory default. Make sure to back up your files prior to performing this process. You can do this by going to Settings > User and Backup then tap the Backup and Reset option. Select Factory data reset then Reset Device. Follow the onscreen prompts and wait for your phone to complete the process. Once done, your device should now be back to its default settings. Any firmware related issues should be resolved and your phone should run properly again. If it doesn’t, then it’s high time to bring it to a technician for consultation and repair. Hope this helps. 

Problem #2: Samsung Galaxy Note 4 Mobile Data turns off whenever the display switches off

Hello. I’m having a problem with my Galaxy Note 4. I got this Note 4 with AT&T in which I got the unlock code from, got it unlocked, and I’m currently using it outside USA on a different mobile network. I have heard this causes mobile network problems, but up until recently, I haven’t had any problems with that. The first problem I had was with the Whatsapp app notifications. I have set the app to always show me notifications, and I’ve doubled check that. However, sometimes when I’m on WIFI, and the connection is working properly with the phone connected, the app will fail to show me notifications. I will receive the messages but the app won’t show me notifications that I got messages. When I open the app, I will notice that I have messages present that I wasn’t notified about. Even Whatsapp calls won’t appear on my phone. This is the first problem, and it rarely happens, but when it does it’s really annoying. I think it might have something to do with lollipop but I’m not sure. The second problem I started having recently is the mobile data stops working the moment I turn off the screen. Meaning, the mobile data will be working properly when the screen is active but the moment I press the power button and the phone’s display turns off, the mobile data stops working. This now happens every time I’m on mobile data. I’m not sure if this is connected to the first problem or not, but this is much more important than the first one. If you can help me I’d be grateful! Thank you very much!Nour Awala

Solution: Hello Nour. Have you tried uninstalling the Whatsapp app? This could be a glitch with the app itself and downloading it again will install recent updates which can fix any issues that the previous version may have.  With regards to the mobile data, this is the first time that such has happened. You will always be connected as long as you are within range of your mobile network regardless if your screen is active or not. The display has nothing to do with your data connection. Have you just downloaded a lollipop update? Did this start to occur after the update? If so, the firmware may have encountered an issue during the update which has affected the Whatsapp app and your mobile data connection. Try formatting your device back to factory default and see if this would help resolve the issue. Please make a backup copy of your files prior to starting the process. You can refer to the Solution part on Problem #1 for the steps in resetting the phone to factory setup. If it did not resolve the issues after, reaching out to Samsung support would be wise at this point.

Problem #3: No network error and Unrecognizable SIM card on Samsung Galaxy Note 4

Hi there! You wrote on one of your Note 4 posts, that you would try to help out people who e-mail you with their problems. I would gladly use this opportunity. I bought a used Verizon Note 4 on my trip to USA last year. It was in mint condition and worked fine on my Estonian network provider and SIM despite the annoying “non-Verizon SIM inserted” note on the taskbar. It was always running the stock 4.3 Verizon Android software and no meddling was done to the phone. I couldn’t update it anyway, since it says error connecting to the software update server. This really didn’t bother me and I continued to use the phone daily. A few months ago though, problems appeared with the location services. The location services worked using WIFI or network positioning, but whenever the GPS is turned on, the device turned crazy and started showing locations around Ukraine, Sweden, Brazil etc. I checked the GPS settings and downloaded some app that more specifically showed the details of the GPS. It just couldn’t find any satellites 90% of the time. I even overlooked that since I couldn’t really fix it and continued to use the phone, since it didn’t affect my daily needs that much. Now, the service on the phone has exponentially turned to absolute crap over the last 3-4 weeks, to the point that I tossed the phone to the side and had to get a replacement, since it clearly just shows NO NETWORK on the taskbar. Before it got that bad, it still had network some of the time, but it was always a little bad, going from no network to 2-3 bars every 5-10 minutes. Basically I was unreachable and the phone really wasn’t usable for a busy person anymore.

 Now, a week ago, I really got sick of it and decided to clean the devices software. Since I’ve also decided to go for an update, and since I couldn’t contact the Verizon update servers here in Europe, I went for a root. So I rooted the device, installed Android 4.5 lollipop on Jasmine ROM, and it all went well. It was kind of usable when it comes to the network, but then it started getting worse and worse again, to the point wherein I have to restart the phone 19 to 20 times, which I didn’t need to do before. It doesn’t even recognize the SIM card anymore. If it does, it turns on and asks for the pin codes every after 20 seconds when it should ask for them straight as it boots up. The GPS seemed to semi-work when it manages to get any kind of network though, meaning that it showed my location okay, but while driving the arrow was moving along the road, but always pointing statically on some random way, not pointing at the way I was driving. What may be the problem? Is it in the hardware or the software and what should I do? I’ve tried googling and searched for the solution but none seems to help. I would really love to get the network back. I tried to be as specific as possible. I would really be grateful for your time and help. Thanks.Georg

Solution: Hello Georg. There are a lot of reasons why this is happening to your device. Since you did a master reset and even successfully rooted the phone’s software, this tells us that your firmware is in mint condition. Having that cleared, we can put the blame on one of these:

  1. The Radio Signal is off. This happens when it gets in conflict with WIFI and GPS or even a bad app that interferes with it. To turn it on, open the dialer and enter these characters *#*#4636#*#*. The Service Mode should open right away without pressing Send. Open the Device / Phone Information and tap on the Run Ping Test Scroll down to the bottom of the page and locate the Turn Radio On / Off button. Press the button and restart your phone once a prompt to reboot appears on the screen.
  2. SIM card is malfunctioning. It could be a bad SIM or it’s just not placed properly. Remove and replace the SIM card to make sure. Also try it on a different phone to isolate if it’s defective or not. If it is, consider getting a new SIM.
  3. SIM card does not allow connection to network. To resolve this, you need to navigate to Settings> Mobile Network Settings. Once inside, hold the power and home buttons at the same time until the device turns off. Remove the battery and then press the home and power buttons ten times simultaneously then hold them down for 1-2 minutes to drain all static charges. Reinsert the battery and turn on the device without the back cover attached. While the phone is on, remove and reinsert the SIM card three times or until you’ll be prompted to reboot. You should get a network signal once your phone boots back up.

If the culprit is none of these, then it’s time to bring it to a technician for repair as the phone’s motherboard may already be defective. Hope this helps.



If you or someone you know 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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One Reply to “Samsung Galaxy Note 4 Network Connectivity Problems”

  1. Not sure if other Galaxy Note 4 phones allow this, but I cannot “Reinsert the battery and turn on the device without the back cover attached; While the phone is on, remove and reinsert the SIM card three times”, because the SIM card is blocked by the battery… Also, “hold the power and home buttons at the same time” only created a screenshot, and nothing else…

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