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.
How to fix Samsung Galaxy S5: Unable to get an OTA when rooted with Custom System Status
- If you have an external SD card inserted, pull it out now, this is a very important step.
- Unzip the downloaded firmware, until you see a file with ‘tar.md5’ extension.
- Run the Odin on your computer, click the PDA button, then points to where you unzip the stock firmware.
- Turn off your phone, then put it on download mode (Vol down + Home + Power).
- Now connect the S5 to the PC via USB, the ‘ID:COM’ section should highlighted now, which mean your phone is identified by Odin.
- Hit ‘Start’ to flash the stock firmware to your phone.
- 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.
- 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.