How to: Fix Samsung Galaxy S5 unable to get an OTA when rooted

Some Galaxy S5 variants are already receiving software updates via OTA, one of which is the Sprint model which updated to software version G900PVPU1AND2. However, several users get an unusual error message when trying to download the OTA update, it says: ‘The operating system on your device has been modified in an unauthorized way …’. This problem often occurs on rooted Galaxy S5, if you get this warning, then there is no other way other than unroot and restore your phone back to stock firmware.


The Samsung Galaxy S5 preloaded with Android 4.4 KitKat which brings significant changes, apart from changes to the User Interface that is easily recognizable, other important improvements is ART (Android Runtime), which is a new runtime like Dalvik, the users can activate it on Settings -> Developer options. Although we’re not sure the ART is the problem, but some folks suggest us not to use it for now.

Fortunately, some users on xda have managed to find the root cause of this issue – the ‘SYSTEM STATUS’, which you can observe while you are in download mode, if your device shows ‘SYSTEM STATUS: CUSTOM’ then you will get the above error message when make an attempt to update via OTA. The only solution is to make your phone system status back to ‘OFFICIAL’ by unroot and restore the firmware with the stock one. Now we’ll show you how to fix ‘The operating system on your device has been modified “issue on Galaxy S5:


  • A Galaxy S5 stock firmware.
  • The latest version of Odin flash tool, you can use any version, but many users choose to use v.3.07.
  • Samsung USB drivers, a Windows computer need drivers to recognize your Galaxy S5.
  • The battery indicator shows 60% or more.
samsung galaxy s5 ota update rooted

Image: Samsung

How to fix Samsung Galaxy S5: Unable to get an OTA when rooted with Custom System Status

  1. If you have an external SD card inserted, pull it out now, this is a very important step.
  2. Unzip the downloaded firmware, until you see a file with ‘tar.md5’ extension.
  3. Run the Odin on your computer, click the PDA button, then points to where you unzip the stock firmware.
  4. Turn off your phone, then put it on download mode (Vol down + Home + Power).
  5. Now connect the S5 to the PC via USB, the ‘ID:COM’ section should highlighted now, which mean your phone is identified by Odin.
  6. Hit ‘Start’ to flash the stock firmware to your phone.
  7. Flash Odin

    Odin flash done

  8. When the flashing process went flawlessly, the next is to perform a factory reset. Boot into stock recovery, then executes a factory reset from there.
  9. Once boots up, now check for the OTA manually, download then apply it.

If you still get the same error message after you perform the back to stock procedure with Odin, this indicates that your Galaxy S5 SYSTEM STATUS still displays CUSTOM rather than OFFICIAL. Don’t worry, lots of users at xda are also experiencing the same problem on the first attempt, but they have been successful on the second attempt.



Filled Under:Tips and Tricks
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8 Responses

  1. Ej
    November 30, 2014 at 10:36 AMReply

    Will this procedure delete all the data on my phone?

  2. sam
    December 4, 2014 at 9:22 AMReply


  3. Rana Anas
    February 8, 2015 at 1:46 AMReply

    Thank you very much
    I applied same method on my Samsung Galaxy core 2 and it works 🙂

  4. Jacob
    February 28, 2015 at 10:18 PMReply

    Did this with my S5 and lost no data and worked on the first go. Thx dude

  5. Anon
    April 29, 2015 at 8:38 AMReply

    I need samsung a5 stock firware

  6. Danu
    June 12, 2015 at 4:51 AMReply

    I never rooted my phone, but it somehow thinks i have a custom.
    Will this work for me? and allow me to then update to 5.0?

  7. iMoRtal
    August 6, 2015 at 10:37 PMReply

    no need to unroot!!! i found this easy way. Just download “Xposed Installer” from the playstore. when finished download the framework from the app. Restart ur phone. Then when done go download “Wanam Xposed” from the playstore. when finished under the “Security Hacks” tab tic the box that sais “Fake System Status” and turn to official. Restart ur phone and boom….ur good 2go!!!

  8. Aamir khan
    December 2, 2015 at 12:52 AMReply

    My a5 can not upgrade due to system is modified in unauthorized way and i also upgrage through odin but when i connect usb odin didnot show the blue sign
    Plz plz plz plz olz solve this problem
    Plz email me on plz

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