Reclaim root after updating Verizon Galaxy S4 to I545VRUFNG6

A new software update with software version I545VRUFNG6 for Verizon Galaxy S4 was already released about a week ago, but there a few users who just get it today. When an update comes, typical users users may want to know what’s changed, if there are any new features or bug fixes, but for an Android enthusiast, they will surely find out whether the new update is the root-friendly, or we would have a trouble to regain root access, since it will be wiped after software update installation performed.


The NG6 software could be a significant update, since it brings plenty of changes, although there is no OS upgrade as the Android version still shows Android 4.4.2 KitKat. There are several improvements and a bug fix that was placed in VRUFNG6 update for VZW Galaxy S4, such as better messaging app connectivity, more accurate AOL mail accounts, Bluetooth and voicemail reliability. In addition to that, Samsung also updates the Knox to version 2.0 for enterprise support.

Now we can reclaim root after updating Verizon Galaxy S4 to I545VRUFNG6. Thanks to XDA senior member – muniz_ri who found a way to regain superuser access with kernel-downgrade method.

NG6 root vzw galaxy s4

Regain root VZW Galaxy S4 runs NG6 update

The downgrade method has been applied to several other Samsung smartphones such as the AT&T variant of the Galaxy S4. It’s easy and safe to accomplish this, we only need to flash an old kernel and use towelroot. Here are some things that need to be prepared:

  • Towelroot-friendly kernel from NC5 firmware, the kernel has a build date before June 3rd.
  • Improved towelroot v3 app.
  • The stock NG6 kernel (latest).
  • Odin3 flash tool, sadly it only works with Windows OS.
  • Samsung OEM USB cable.
  • Make sure you download the required files directly from muniz_ri’s thread on xda.

The guide has been explained in muniz_ri’s thread, but if you feel it’s hard to understand, here we wrote the overview:

  1. Update your VZW GS4 to the latest software (NG6), your phone will be unrooted afterwards.
  2. Download the customized towelroot v3 app only from muniz_ri thread.
  3. Turn off then boot the phone into the Download Mode (Home + Vol down + Power), when you notice a warning screen just select continue.
  4. Run Odin3 app on your phone, connect the phone into a PC via USB cable.
  5. On Odin3 click PDA/AP button, then point to NC5 kernel (tar.md5).
  6. Instal towelroot and hit ‘make it ra1n’ button.
  7. Once done, flash back the kernel to NG6 with Odin3.
  8. Done, your Verizon Samsung Galaxy S4 running I545VRUFNG6 update should rooted now.


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14 Responses

  1. Anonymous
    October 17, 2014 at 9:12 PMReply

    I’m not sure if it’s just me, but my phone swapped the window manager and bookmark icons on the Internet app and it’s bugging me a lot. Anyone know how to fix it?

  2. Al
    October 19, 2014 at 5:49 AMReply

    There’s a problem being posted in verizon forums. Users, including me are experiencing random reboots after the update. Very frustrating. Need to follow before you recommend updating!

  3. Joey
    October 20, 2014 at 9:25 PMReply

    Step 2 tells me my phone is not supported and then step 3 just says downloading forever and I have to reboot it. I let it go for an hour just to make sure.

    Any ideas? Verizon Galaxy S4 SCH-1545…

    • Author

      Robbie S.
      October 21, 2014 at 1:36 AMReply

      Your S4 should running NC5 kernel before make an attempt to root with towel.

  4. aafr
    October 21, 2014 at 8:28 AMReply

    I had no issue installing with this method and regaining root access. I too am having the reboot issue after the update.

  5. d
    October 22, 2014 at 11:20 AMReply

    I also have the reboot issue… why did I switch from iphone I never had these stupid issues before..

  6. Gabe G.
    October 24, 2014 at 8:36 AMReply

    When I flash the phone back to NC5 I have no wifi and towelroot will not run without wifi so what do I do now?

  7. Gabe G.
    October 24, 2014 at 8:38 AMReply

    I meant that it would not run with internet access, can I get internet access through usb connection?

  8. Mike
    October 25, 2014 at 5:14 AMReply

    Ok folks here is how I got it to work for me…I was running a rooted version of NC5 so I had to un root (so flash the no error version with Odin)I have the paid version of Super SU. For whatever reason the base version didn’t stay on me phone after i

  9. Mike
    October 25, 2014 at 6:10 AMReply

    Delete my previous comment, I hit post before I was done….
    Here is what I did that worked. I used Odin, went back to NC5 no root using no wipe tar. It Worked, took OTA update to NG6, then followed your process. After flashing the NC5 kernal my phone constantly rebooted, I removed the battery and it slowed the time between reboots so I could get to towel root, Here’s the thing that took me a while to figure out, so I’ll share so maybe it’ll help someone else: I have the paid version of Super SU (it’s an add-on to the base free version) however the base version got deleted somehow using the no wipe NC5 so after using towel root, I still didn’t have root till I installed the base super SU again. Once I did I got root access, flashed the NG6 kernal and phone has root and has been stable since.

  10. Bob Simoneau
    October 25, 2014 at 10:24 AMReply

    I did the odin to NC5, towelroot, odin to NG6 and had random reboots and launcher unlock freeze problems. After two days of reboots I surrendered and used odin full-wipe to get back to NC5. I reinstalled all my apps except towelroot and Supersu. I was solid again,but annoyed by the OTA. Two days ago I answered install for the OTA. Not I single reboot or freeze since. Knock on wood (Visual: Tapping side of head).

  11. corey
    November 10, 2014 at 3:43 AMReply

    If you root ng6 you will have the reboot issues. Iv tried 3 or 4 times to root mine and I get reboots everytime. I finally reset my phone to ng6 and didn’t root it and I have no issues.

  12. JunkMan
    November 11, 2014 at 2:37 PMReply

    I had the multiple reboot and lock saver issues. I resolved them by putting the NG6 back, removing my screenlock and putting the TowelRoot icon on the home page. I then put the NC5 kernel back and I could get TowelRoot up and done before it rebooted again. I then restored the NG6 and it is working fine. For reboot issues after rooting and restoring NG6, see gala…-root-t2921584.

  13. charlyRoot
    December 16, 2014 at 3:18 PMReply

    OK. If in a loop, pull battery as soon as freeze. This did seem to add time between lockups. I cleared cache but no noticeable change there. 2) Installed towelly several times but would never show in apps. I got the warning with the check box the first coulple of times but it eventually stopped. It was like I was getting further and further each time BUT several times I did install and get to click around on home screen after before freezing. For some reason I still think there was progress with the installs. 3) I placed in airplane mode to reduce the crap it was trying to process at boot. (It like you are only given X processor cycles before freezing so I cleared all widgets from and home screens. Then cleared all notifications by opening app NOT hitting clear in dropdown notis. )When you go to install apk when it’s already installed, you get two options, the FIRST time I chose ALL when installing towelly, I got all the way too making it ra1n.
    – pull battery to save time
    – work on clearing anything that has to load at boot (widgets, notifications…)
    – wipe cache (power+home+VolUp THEN at vibrate release power only)
    – airplane mode
    – once you appear to make it through towelly install, on next reboot install again but this time choose the option on the right which I think is ALL
    – Oh step one is set aside an hour. 45 mins to do all of this and 15 minutes to share your observations.

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