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

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craznazn

Senior Member
Nov 12, 2009
511
223
OnePlus 8T
OnePlus 9 Pro
Hello, I'm having trouble applying the ColorOS downgrade on Oxygen 11.2.3.3.LE15BA. I get the "Installation package does not meet the necessary requirements". I've also tried to use the Full OTA in conjunction with resetprop, and it gives the same message. Any ideas?
 

FlynnFloyd

New member
Apr 10, 2021
1
0
I don’t have a global9p, but I will try, it may be difficult
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 Pro
Oxygen OS for OnePlus 9 Pro
Installation steps: Settings - System - System updates - Settings (top right corner) - Local upgrade - Select the previously downloaded downgrade package - CONFIRM .....about this one after i press settings then system i don't have that system option only ' software update ' which every time i try it tells me verification failed any ideas ?!
 
Hello, I'm having trouble applying the ColorOS downgrade on Oxygen 11.2.3.3.LE15BA. I get the "Installation package does not meet the necessary requirements". I've also tried to use the Full OTA in conjunction with resetprop, and it gives the same message. Any ideas?
At present, this method is only applicable to the CN version of LE2120/LE2110. For other versions, I'm working on it
 
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Bilhouse

Senior Member
Apr 14, 2011
427
65
At present, this method is only applicable to the CN version of LE2120/LE2110. For other versions, I'm working on it

Thank you. I'm getting my EU OnePlus 9 Pro and I would like to move to Color OS when I get it as I prefer it to Oxygen OS. Hopefully you can find a method for us to install the ROM.
 

Khalid Ghouri

Senior Member
Nov 1, 2015
96
9
45
Faisalabad
Installation steps: Settings - System - System updates - Settings (top right corner) - Local upgrade - Select the previously downloaded downgrade package - CONFIRM .....about this one after i press settings then system i don't have that system option only ' software update ' which every time i try it tells me verification failed any ideas ?!
first download the downgrade package and install it locally that is indian rom after that install on it 11.2.3.3EU version and enjoy the OxygenOS
 
Last edited:

Khalid Ghouri

Senior Member
Nov 1, 2015
96
9
45
Faisalabad
Finally !
 

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Brownpigaro

New member
Apr 11, 2021
4
0
This method is only applicable to the CN version of LE2120 / LE2110

nothing wrong with these two models
So the downgrade from color to oxygen os wont impact the IMEI version/number? Need to cross check since my country has this strict regulation related imei. If the Imei change after i flashed it I'm affraid I wont be able to use the phone since the registered Imei to get the network would be the one on the box (before changing to oxygen os).
 

Khalid Ghouri

Senior Member
Nov 1, 2015
96
9
45
Faisalabad
My oneplus 9 pro from chinais a and would like to hse Oxygen OS. I downloaded from the link and when I do a local install, I got a verification failed message. please advise....
DOWNLOAD THE PACKAGE FROM THIS LINK
 
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Fiter8x

Member
Apr 10, 2021
9
1
OnePlus 9 Pro
DOWNLOAD THE PACKAGE FROM THIS LINK
What is the password? I try to download from that link but password required.
 

ENAUEN

New member
Apr 12, 2021
2
0
DOWNLOAD THE PACKAGE FROM THIS LINK
I would like to try to download it from here although it says a password is required. Can you please advise
 

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  • 1
    Is Android 12 Beta still having these issues?

    Known Issues
    – All data will be cleared while flashing the build
    – Video call function is not available
    – Fingerprint unlock and face unlock are unavailable
    – Certain UI screens look less than desirable
    – Some apps may not function as expected
    – System stability issues
    – Probability of camera crash when HDR mode enabled.

    Android 12 Developer Preview hasn't evolved into anything different yet, no. So it still has the bugs that you have listed.

    But it's only a step in-between, in order to flash the proper A11 build of ColorOS.
  • 7
    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 Pro
    Oxygen OS for OnePlus 9 Pro
    2
    Can anybody share a video tutorial.. It will be very helpful..i am really confused...
    2
    Finally !
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    OOS 11.2.3.3
    LE2120
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    What about volte and 4g+ (carrier aggregation)?
    4g+ and volte work for me but no 5g
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    Can you get the colorOs update for the OnePlus 7T instead of the OS update?
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