08-30-2017 12:09 PM
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  1. flyers21's Avatar
    Hello, I have a Verizon Galaxy s5 5.0 lilipop with a baseband and build number that ended in OC4. I cannot get the entire number now because my phone is stuck on "firmware upgarde encountered an issue" screen after I attempted to revert back to 4.4.4. kitkat. I was under the impression that if I was not OE1 or OG5, i would be able to downgrade using ODIN. I installed kies, downloaded 4.4.4 from sam mobile and used ODIN v3.09 and tried v3.10.7 and failed both at system.img.ext4. with the screen "downloading do not turn off target". It was stuck there FOREVER until it timed out to a FAIL and now says "firmware upgrade encountered an issue". I cannot master reset using volume up, power and home keys and im now stuck. I dont know all the technical verbiage, so im trying to explain all this the best i can. I guess my questions are: Is it true that i can downgrade to achieve root at OC4? If not, how do I fix what i did? Thanks
    10-08-2015 10:22 PM
  2. ironass's Avatar
    Hello, I have a Verizon Galaxy s5 5.0 lilipop with a baseband and build number that ended in OC4. I cannot get the entire number now because my phone is stuck on "firmware upgarde encountered an issue" screen after I attempted to revert back to 4.4.4. kitkat. I was under the impression that if I was not OE1 or OG5, i would be able to downgrade using ODIN. I installed kies, downloaded 4.4.4 from sam mobile and used ODIN v3.09 and tried v3.10.7 and failed both at system.img.ext4. with the screen "downloading do not turn off target". It was stuck there FOREVER until it timed out to a FAIL and now says "firmware upgrade encountered an issue". I cannot master reset using volume up, power and home keys and im now stuck. I dont know all the technical verbiage, so im trying to explain all this the best i can. I guess my questions are: Is it true that i can downgrade to achieve root at OC4? If not, how do I fix what i did? Thanks
    Hello and welcome to Android Central flyers21!

    Providing the Verizon G900V has never, ever, received the OE1 or OG5 Verizon firmware releases with the mega locked down bootloader, then they can be downgraded. However, unless you are rooted already, these firmwares are pushed by Verizon, automatically, to your phone with no option to refuse. See post #1 of, Verizon's new OE1 & OG5 updates prevent downgrading or rooting

    Therefore, I wonder how you have thus far escaped being upgraded to OD5, OE1 and OG5 over the last 4 months without being rooted?

    Have you owned this phone from new, out-of-the-box, from Verizon?
    10-09-2015 01:51 AM
  3. pstreck1's Avatar
    Obviously it's very shady of Verizon/Samsung to prevent rooting, especially given how flawlessly Lollipop has been I can picture the conversations between Verizon/Samsung/Google.

    "Harummph" (Blazing Saddles). Lollipop is going great...
    Q: OK, how many people have upgraded?
    A: We are up to half of what we projected!

    Well then force the updates

    Next meeting...
    Q: Is everybody upgraded?
    A: Pretty much
    Q: Who isn't?
    A: Well see we've inadvertently created a black market on craigslist and the android forums where people are able to root their phones and revert back to KitKat. The customers that can't do it themselves are willing to pay complete strangers on Craigslist to undo our software updates.

    Then block their ability to do that too...

    I only wish I had rooted when I could have.
    10-09-2015 05:44 AM
  4. ironass's Avatar
    Obviously it's very shady of Verizon/Samsung to prevent rooting, especially given how flawlessly Lollipop has been I can picture the conversations between Verizon/Samsung/Google.
    The mega locked bootloader that prevents downgrading or rooting is nothing whatsoever to do with either Samsung or Google!!! See #1.6 of 41 Galaxy S5 models - Dummies Guide and post #1 of Verizon's new OE1 & OG5 updates prevent downgrading or rooting

    "Harummph" (Blazing Saddles). Lollipop is going great...
    Q: OK, how many people have upgraded?
    A: We are up to half of what we projected!

    Well then force the updates

    Next meeting...
    Q: Is everybody upgraded?
    A: Pretty much
    Q: Who isn't?
    A: Well see we've inadvertently created a black market on craigslist and the android forums where people are able to root their phones and revert back to KitKat. The customers that can't do it themselves are willing to pay complete strangers on Craigslist to undo our software updates.

    Then block their ability to do that too...
    Alternative scenario...

    Verizon CEO: "Our customers are refusing updates to Lollipop with all our extra revenue generating bloatware, our rubbish, ersatz, cloneware and our new NSA spyware and are downgrading and rooting in their hundreds of thousands to avoid it and we are losing money. We need to find a way of making sure that they cannot root, refuse updates or bloatware and spyware!"

    There are only 2 of the 41 models of Galaxy S5 that do not allow rooting and both of those, AT&T and Verizon, use cloneware, issued by themselves. I am on the worldwide G900F model which is on the latest Oi3 firmware from Samsung and it is fine with a very simple and easy root process, as are the other 200+ firmwares issued for it worldwide and the other 39 models.

    I only wish I had rooted when I could have.
    I am afraid that ship has well and truly sailed for AT&T and Verizon customers...

    10-09-2015 06:14 AM
  5. flyers21's Avatar
    I bought the phone on ebay and it was not used for very long and im not sure if it was in use over the last 4 months. I know for sure it was on oc4 because it checked prior to attempting to revert back to kitkat. Also, when I installed kies and plugged in my phone, it informed me of an upgrade which i did not perform. Now im not sure what to do because i should be able to downgrade but im getting stuck in odin at "system.img.ext4".
    10-09-2015 08:23 AM
  6. ironass's Avatar
    I bought the phone on ebay and it was not used for very long and im not sure if it was in use over the last 4 months. I know for sure it was on oc4 because it checked prior to attempting to revert back to kitkat. Also, when I installed kies and plugged in my phone, it informed me of an upgrade which i did not perform. Now im not sure what to do because i should be able to downgrade but im getting stuck in odin at "system.img.ext4".
    If you are absolutely sure that you have never had Verizon OE1 or OG5 firmware on your phone, then I suggest trying different ports on your PC, (not a USB hub), different cables, (stock Samsung OEM S5 cable is best), to see if that solves your firmware flashing problem.
    10-09-2015 08:32 AM
  7. flyers21's Avatar
    yes, i remember baseband and duild version ended in OC4. And like i said, keis informed me of an update which i didnt perform. I will try again and see what happens. Could it be i downloaded the wrong firmware? I got it off sam mobile and the title of it is : G900VVRU1ANK2_G900VVZW1ANK2_VZW.zip
    10-09-2015 08:42 AM
  8. ironass's Avatar
    yes, i remember baseband and duild version ended in OC4. And like i said, keis informed me of an update which i didnt perform. I will try again and see what happens. Could it be i downloaded the wrong firmware? I got it off sam mobile and the title of it is : G900VVRU1ANK2_G900VVZW1ANK2_VZW.zip
    The NK2 firmware is just fine, although you could try re-downloading in case you had a bad download. You can read and follow the instructions and downloads in post #1 of Verizon downgrade to KitKat - Dummies Guide which is a very detailed tutorial for your model of phone.
    10-09-2015 08:49 AM
  9. flyers21's Avatar
    Yes, i changed the usb cord and changed the port that was used and it worked!

    The phone rebooted and now the phone is stuck on the red verizon screen...
    10-09-2015 09:05 AM
  10. flyers21's Avatar
    I wiped cache partition and reset factory data and it worked. Phone is on and im on kitkat 4.4.4! Thanks for your help, you guys are great. If you could point me in the direction of how to root now i would really appreciate it. I looked around, but it seems a little confusing and if there was a "dummy guide" that would be helpful.

    new baseband version:
    G900VVRU1ANK2
    10-09-2015 09:24 AM
  11. ironass's Avatar
    Yes, i changed the usb cord and changed the port that was used and it worked!

    The phone rebooted and now the phone is stuck on the red verizon screen...
    Wipe cache partition as per #1.12 of the Dummies Guide I linked you to

    I wiped cache partition and reset factory data and it worked. Phone is on and im on kitkat 4.4.4! Thanks for your help, you guys are great. If you could point me in the direction of how to root now i would really appreciate it. I looked around, but it seems a little confusing and if there was a "dummy guide" that would be helpful.

    new baseband version:
    G900VVRU1ANK2
    Congratulations flyers21!

    All the links you'll ever need to rooting the Verizon Galaxy S5 are in post #38 of the aforementioned Dummies Guide.

    Be aware, that by downgrading you are not covered for the latest security updates for things such as Stagefright, among others.
    10-09-2015 10:49 AM
  12. flyers21's Avatar
    checked out all the links and doesnt seem like any of them are specifically for NK2 build...

    found one, but it wont let me post a link to for someone to check put and make sure its ok to use...

    https:// blog.plip.com /2015/01/12/ root-on-verizon-galaxy-s5-on-nk2-firmware/
    10-09-2015 07:49 PM
  13. ironass's Avatar
    checked out all the links and doesnt seem like any of them are specifically for NK2 build...

    found one, but it wont let me post a link to for someone to check put and make sure its ok to use...

    https:// blog.plip.com /2015/01/12/ root-on-verizon-galaxy-s5-on-nk2-firmware/
    That is because if, apart from downgrading, you now also wish to root your Verizon phone, you will need to downgrade even further to Verizon's Android 4.4.2 firmware, NCG, or flash the rootable kernel from the NCG firmware, as per your link, as Verizon made rooting impossible after Android 4.4.2 and then followed this up a year later by making downgrading impossible with their Lollipop, OE1, release for Android 5.0 when they found that their customers were downgrading, in their thousands, back to Android 4.4.2 to root so they could refuse Verizon's updates and remove the not inconsiderable, Verizon bloatware.

    Once you have successfully rooted, you may be interested in the following thread as it details how to move up to Android 5.0 release OG5 which contains the latest security updates, and retain root...

    [How-To] Update to G900V_OG5 - 5.0 and KeepRoot

    More help on rooting can be found in the section of the forum devoted to it... Samsung Galaxy S5 Rooting, ROMs & Hacks
    10-10-2015 01:53 AM
  14. Char Resendiz's Avatar
    Hey bro, i just have the same problem, i was trying to go back from lollipop to kit kat but i got now a bricked phone, could you please help me to get my phone ready again, no matter if it is lollipop.
    10-10-2015 07:02 PM
  15. ironass's Avatar
    Hey bro, i just have the same problem, i was trying to go back from lollipop to kit kat but i got now a bricked phone, could you please help me to get my phone ready again, no matter if it is lollipop.
    Hello and welcome to Android Forums Char Resendiz!

    First and foremost, which of the 41 models of Samsung Galaxy S5 do you have?

    Secondly, which firmware were you on prior to your downgrade attempt?

    Thirdly, have you tried wiping the cache partition as per post #286?
    10-10-2015 07:15 PM
  16. andy alarcon's Avatar
    Hello so i am currently trying to downgrade my SM-G900A back to kit kat so i can root and i was wondering if it was still ok to downgrade considering the situation with Verizon? my carrier is AT&T though
    10-11-2015 11:44 AM
  17. ironass's Avatar
    Hello so i am currently trying to downgrade my SM-G900A back to kit kat so i can root and i was wondering if it was still ok to downgrade considering the situation with Verizon? my carrier is AT&T though
    Hello and welcome to Android Central andy alarcon!

    If you are currently on the latest Lollipop firmware from AT&T, like Verizon, downgrading and rooting is no longer possible. See #1.6 of 41 Galaxy S5 models - Dummies Guide
    10-11-2015 12:02 PM
  18. andy alarcon's Avatar
    I was going to try downgrading back to kit kat and then using towel root.
    How come others have been successful in downgrading ?
    10-11-2015 12:12 PM
  19. ironass's Avatar
    I was going to try downgrading back to kit kat and then using towel root.
    How come others have been successful in downgrading ?
    The key word in my earlier reply, is, "latest". Others were on earlier releases of Lollipop that allowed downgrading. If you are on OF3 firmware from AT&T, then I am afraid that rooting is now history for you.
    10-11-2015 12:42 PM
  20. flyers21's Avatar
    yes, my baseband and build number ended in OC4 which was not the latest lollipop so I was able to revert back to kitkat.
    10-11-2015 12:53 PM
  21. flyers21's Avatar
    Nevermind, i got flashfire installed... On the website you sent me to for upgrading to lollipop while keeping root ([How-To] Update to G900V_OG5 - 5.0 and KeepRoot) the stock rooted rom is G900V_OG5, but the bootloader you have to flash is G900V_OD5.

    Does that make a difference?
    10-11-2015 06:05 PM
  22. ironass's Avatar
    That Flashfire v19 download link is working fine for me.
    10-11-2015 06:21 PM
  23. flyers21's Avatar
    I downloaded flashfire v0.24 rrom the play store, but I updated my post above yours with a question from the website you sent me. thanks
    10-11-2015 06:25 PM
  24. ironass's Avatar
    I downloaded flashfire v0.24 rrom the play store, but I updated my post above yours with a question from the website you sent me. thanks
    Yes, it does as they changed the bootloader on OE1 and OG5 to the mega locked down version which you do NOT want. You may do better asking in either the xda forum thread that I linked you to or starting a thread in Samsung Galaxy S5 Rooting, ROMs & Hacks
    10-11-2015 06:48 PM
  25. Abu Saleh Sumon's Avatar
    Thanks a lot! It did work for me and fixed the poor network signal and voice quality problem!
    10-24-2015 11:08 AM
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