How To Fix Wi-Fi or Mobile Data Connection Issues on Samsung Galaxy S4 [Part 1]

Problem #8: Samsung Galaxy S4 won’t connect to Verizon LTE when old battery is inserted

Greetings! I have decided to take you up on your offer. I have a Samsung Galaxy S4 that is about 1.5 years old. It recently developed a problem with connecting to Verizon LTE. 

It appears that when I fully charge it overnight it loses all connection bars. This can be corrected if I remove and replace the battery. This was discovered when I was filling out an insurance claim to get a new phone and needed serial numbers. The problem went away. But when I charged the phone over night I again lost all the bars until I disconnected the battery. My wife’s phone which was acquired at the same time but has less stuff (programs, apps, files) on it does not have this problem. 

Is this a problem with a software program or should I file an insurance claim and get a new phone because there is a hardware problem?

 Thanks for your assistance. — Dan

Solution: We can’t see the logic of a battery affecting the function of your phone’s  4G LTE radio but it’s foolhardy to argue with a fact. Have you considered getting another battery instead of having the phone replaced? Doing so would save a lot of trouble as you can skip re-downloading all your apps again as well as setting up the entire phone to how you want it to work.

Because you have already isolated the problem to the battery, we don’t think there’s any firmware or hardware issue here.

Lollipop Wall


There has been a noticeable spike in connectivity problems after Samsung Galaxy S4 devices were updated to Android Lollipop beginning a few weeks ago. Below are the common solutions that you can try if you encounter any problem right after the firmware update:

  1. Wiping the phone’s cache partition. A big operating  system update like switching from KitKat to Lollipop can create a huge mess in your phone’s directory and cache. Although there’s a mechanism in place to clean this mess up, it usually only works on paper and does not actually happen resulting a range of problems. These troubles usually manifest once the phone starts behaving oddly, apps loading noticeably slower, and some functions suddenly acting weird or plainly stops working. If this happens, it’s recommended that a user delete the cache partition by following the steps below:
    • Turn the phone off completely.
    • Press and hold the Volume Up, Home and Power buttons.
    • Release the Power button when the phone vibrates but continue holding on to the Volume Up and Home buttons.
    • When the Android System Recovery screen appears, release both the Home and Volume Up buttons.
    • Using the Volume Down key, highlight wipe cache partition.
    • Press the Power button to select the option.
    • The phone will automatically restart once cache data are wiped out.
  2. Power up the phone in Safe Mode. Also known as the diagnostic mode, Safe Mode prevents third party applications and settings from running so it’s a great tool to use when one is not sure whether or not the new firmware is to blame. If you cannot replicate the issue while in this mode, that’s a telltale sign that one of the installed third party apps is the culprit. You need to confirm this by uninstalling each of them starting from the most recently installed. There’s no faster way than this so if you have tons of installed apps, this process may take you a long time to finish until you can isolate where the problem lies. If you haven’t tried booting up in Safe mode before, here’s how:
    • Turn the device off completely.
    • Press and hold the Power button.
    • Once the Samsung Galaxy S4 logo appears on the screen, release the Power button.
    • As soon as you release the Power button, press and hold the Volume Down key.
    • Continue holding the Volume Down key until the phone has completed the reboot process.
    • If you can read ‘Safe Mode’ at the bottom left corner of the screen, release the Volume Down key. Otherwise, repeat the process until you can boot the phone to Safe Mode.
  3. Remove bloatware from your phone. The number of bloatware–unnecessary, redundant, or even useless apps–depend on how many of these apps your carrier is willing to give to its subscribers. Almost all carriers tend to force their way into their subscriber’s devices by introducing bloatware right after an operating system update. The problem for users is that these apps cannot be uninstalled unless a phone is rooted. That definitely sucks but that doesn’t mean you cannot stop them from running.  Bloatware are often designed to run in the background thereby draining the battery faster and reducing the phone’s RAM that may result to slow performance. Other apps may even eat up data without the user’s knowledge! Anyway, if you think you have an unhealthy share of bloatware after the Lollipop update, kindly go to Settings>Applications>Application manager>Running tab. If you can see apps in the Running tab that you are not using, it’s most likely a bloatware so you can go ahead and disable them by tapping on each one first.
  4. Do a factory reset/hard reset/master reset. As the name suggests, this solution brings the phone back to its original factory state, thereby effectively deleting personal data, third party apps and settings, bloatware, and even malware. As some of you may have already known, this should only be done as a final, desperate move after exhausting all possible troubleshooting steps. Do not forget to create a backup copy of all your photos, videos, music, contacts, etc before proceeding.
    • Turn the phone off completely.
    • Press and hold the Volume Up, Home and Power buttons.
    • Release the Power button when the phone vibrates but continue holding on to the Volume Up and Home buttons.
    • When the Android System Recovery screen appears, release both the Home and Volume Up buttons.
    • Using the Volume Down key, highlight wipe data / factory reset.
    • Press the Power button to select it.
    • Using the Volume Down button again, highlight Delete all user data.
    • Press the Power key to select it.
    • Once the reset is complete, choose Reboot system now.
    • Press the Power button to restart the phone.

24 Replies to “How To Fix Wi-Fi or Mobile Data Connection Issues on Samsung Galaxy S4 [Part 1]”

  1. My samsung J7 2015 data, does not work unless I restart it. And then after using, I turn off the data. While ago it won’t work again, if I turn on the data so I have to restart again my phone. Same routine, whenever I turn off the data, It won’t work again for the 2nd time you turn it on and so on. why do I need to restart my phone before it works. ? What’s the problem? Thanks.

  2. @Julie. its a hardware problem . D blue tooth and wifi are on d same chip. so d chip is disconnected from ur phones motherboard.either due to a fall or hard hit. It will need to b opened to reconnect it back. no other solution. factory reset. settings changing etc won’t work. take it to a trusted repair centre.

  3. Comment*
    Am using Samsung note 4 , I have a problem with my mobile data connection, I keep on receiving Mails, messages and also am able to access the Internet whiles the mobile data is off.

  4. My Samsung Galaxy S4 on Net10 (a tracphone company) updated from KitKat to lollipop because I kept getting the notification for AT&T to upgrade the device. Well, I lost my data capability although I could call out using the phone. My Net10 was s BYOP SIM card. When I installed this card a year ago, I had to configure a Net10 Access Point Name.

    The solution was this and I am not seeing it above. Evidently during the upgrading process the Access Point Namd (APN) was switched to AT&T. Selecting Net10 restored it back to everything!

    Settings>More>Mobile Networks>Access Point Names

  5. please i have a problem with my samsung s4 verizon when i open its mobile data i cant use my internet connection and its brand new american version but am in cameroon so with hotspot it cant open am so confused what can i do please to solve the problem?

  6. Hi

    I have a sumsung J3 it is eating airtime and data even when I’m not using any application and not making phone calls. How can I sort out this problems?

  7. Hi, my sumsung j3 phone eat data even not browsing or downloading and even when mobile data is off. It is also eating all the airtime when not phoning how can I solve this problems.


  8. Hey I have an Samsung galaxy j2 prime and it connects perfectly fine to my WiFi but the internet won’t work and I know its not a problem of the router or service becausr i have another phone that is conected to the same network and it works just fine

  9. My Samsung A3 Does not connect data at all. I tried to switch it off and on but it still gives me same problem. Please help me.

  10. I have redone ping test & soft reboot but still my samsung a5 2016 wont connect to wifi. It says “turning on” & then fails. Don’t really want to reset to factory settings as loads of music on here, is there anything else I can try?

  11. I am connecting my phone with wifi but it is disconnecting with wifi and automatically connecting to mobile data.please provide me a solution for my issue
    My device is Samsung galaxy core GT-I8262, and my operating system is android jelly bean

  12. My samsung S4 is having an issue with both the WiFi and the Bluetooth. Neither is able to turn on at all. When the WiFi button is pushed it thinks for a while and then just turns it off without activating. Same goes for the Bluetooth. The phone is virtually useless at this point unless I want to use all my data. Please help. We have tried restarting, trying to activate it multiple times, taking out the battery while the device was powered on, and factory reset with no success. The only thing I haven’t tried is to take out the innards and check out the actual hardware. Before I go this route I’m wondering if you have any other suggestions.

  13. My problem is regarding ” Mobile Data ” unable to be active. Even so I pressed it, but as I checked in About device/Status/Mobile network state. It’s disconnected.
    So I tried every a-z as you posted up there. Non of it worked. So yeah.. Any other solution regarding this ? It just happened after I received a Software update just yesterday, But after the update, it worked fine for a while. So I went outdoors, then I switched to MD it was fine for an hour, then the icon disappeared.

  14. Ummmm my blackberry is a z10 and it says I need a data connection to work it, what is one and why can I use my normal internet

  15. @cassidymichaelwall:disqus – You’re trying to make yourself sound like an expert by mentioning alogcat and ADB…meanwhile you’re an idiot for dissing on a person who is giving advice for those googling on their issues…so if you dont know how to do a backup, carry on googling and ye shall find it…otherwise carry on standing in the queue at your SP!

  16. I have a question. Do you work at AT&T? Not everybody wants or needs to do a factory reset. Its the absolute last option to use. Im sorry but that was some of the laziest fix advice ive ever read. Im having problems with my data(not wifi) connection with no phone or text. I went to at&t and guess what, im gonna need a system restore. Idiots. 4th time ive been told to do that there but never have. I just research a little and fix it myself. Im gonna figure out with wrong with my phone by running an ADB with alogcat and troubleshoot with terminal emulator and do it myself. You should get a bit deeper next time. Alot of people cant even backup their phones.

    Note3 5.0.2 Dialed_Pimped_Aurora.Full-S6.Port.No.3.0

  17. my samsung s4 is suddenly restarting every minute or so and neither wiping cache nor starting in safe mode work. luckily, in airplane mode the os becomes stable and i was able to back up my data to my laptop. i have an SGH-M919 with TMobile and am running Android (or whatever it is) 4.4.4 …everything was fine until I woke up this morning — battery had only charged 50% over night (should have been at 100%) and it kept restarting. …also, I cannot turn off password protection to None. I only have a few seconds between restarts in regular mode and inputting my PIN takes valuable time. Any advice?

  18. my samsung galaxy mini is not connecting to mobile data.first is all fine but after restore setting my mobile data not working all the remain are working. wifi,getting call,messages,videos all fine but only mobile data not connecting

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