How To Guide OnePlus 9: How to switch between Color OS and Oxygen OS without unlocking the bootloader

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    The China variant of the OnePlus 9 series comes with Color OS instead of Hydrogen OS by default, which is not good news for geeks as Color OS has many limitations compared to Hydrogen OS. Recently, OnePlus has officially provided a way to switch between Color OS and Oxygen OS.

    Please note that switching systems will clear all user data, so you better know what you're doing.

    · Switch from Color OS to Oxygen OS

    Download the downgrade package for the appropriate model and system and put it in the internal storage.

    Installation steps: Settings - Software update - Settings (top right corner) - Select installation package - Select the previously downloaded downgrade package - Install now - Install now

    If the Select installation package option is grayed out, it means that you now have a pending system update and you can choose to install or skip it.

    To skip update: Settings - App management - App list - Menu (top right corner) - Show system - Software update - Storage usage - Clear data - OK - Disconnect all network connections

    · Switching from Oxygen OS to Color OS
    Download the downgrade package for the appropriate model and system and put it in the root directory of the internal storage.

    Installation steps: Settings - System - System updates - Settings (top right corner) - Local upgrade - Select the previously downloaded downgrade package - CONFIRM

    Just reboot your device after the installation is complete and have fun!

    Downgrade packages:
    Color OS for OnePlus 9
    Oxygen OS for OnePlus 9
    1
    Can you please reupload the Color OS Downgrade package for OnePlus 9 Pro to Google Drive or MEGA for me. I want to move from Oxygen OS to Color OS.

    I have tried for hours to download from the links you provided but I cant as I am not in China and it either requires Baidu, QQ or WeChat accounts with a Chinese mobile number.

    Thank you!
    I don’t have enough GDrive capacity, so I am uploading it to mega & androidfilehost. After uploading, the original message will be edited without notice.
    1
    Does the chinese variant will get the all bands of global variant after switch to oxygen os?
    1
    How can you tell whether you have Color OS or OxygenOS?View attachment 5303297
    Based on your build number, it stated that it is Oxygen OS indian version.
    1
    It's not a deal breaker for me since we can manually get 5G from the dialer. However, the functionality is there but it somehow needs an update from Oneplus to add 5G from the preferred network. I really hope Oneplus would fix these issues.
    im hoping for that too and with the release of oneplus 9 here in ph.. i hope the fix should be on its way soon..