• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

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

Search This thread

benhidalgo

Senior Member
Dec 13, 2012
98
18
Hey, I see a lot of confusion about IMEI and stuff.

I am currently running Oxygen 11 on my EU 9 Pro: LE2123

Want to switch to ColorOS. Will I be able to do that with no issues? I honestly cannot make much sense out of the mix of messages and versions... Thank
None. I switched to OOS and back to COS with no issues. Follow the OP it's easy. COS is my favorite so far. But they're both great.
 
  • Like
Reactions: schwarzerfleck

schwarzerfleck

Senior Member
Aug 20, 2015
287
139
Berlin
OnePlus 8T
OnePlus 9 Pro
None. I switched to OOS and back to COS with no issues. Follow the OP it's easy. COS is my favorite so far. But they're both great.

Thank you very much. I just switched to COS on my 8T without any issues, more than a month ago, but 9 Pro was not as straight forward from the Q&A.

ColorOS is far superior in my eyes, from both subjective AND objective standpoints. Good that I can switch to it on my main device.
 
  • Like
Reactions: car king

benhidalgo

Senior Member
Dec 13, 2012
98
18
Thank you very much. I just switched to COS on my 8T without any issues, more than a month ago, but 9 Pro was not as straight forward from the Q&A.

ColorOS is far superior in my eyes, from both subjective AND objective standpoints. Good that I can switch to it on my main device.
Which build number do you have? I have the 120. I think the T-Mobile is the only one with a drawback. Like Dr Strange said: "It's a Simple Spell But Quite Unbreakable."
 

KolleDerBoss

New member
Jun 23, 2021
1
0
Hello. I have an EU OP9 Pro and wanted to switch to Color OS. The downgrade worked, but I can't install the Color OS file. Has anyone here already done this with an EU OnePlus or is it generally not possible to change the OS?
 

schwarzerfleck

Senior Member
Aug 20, 2015
287
139
Berlin
OnePlus 8T
OnePlus 9 Pro
Here is a lengthy way to get this working on a EU 9 Pro with WORKING SIM card. I just completed my first phone call! Only do this if you know what you are doing and if you are familiar with the concepts of flashing ROMs, using fastboot to flash partitions and possibly using the MSM tool to restore your device in case something goes wrong. I told you.

Steps to switch from OOS>COS on non-chinese OnePlus 9 Pro. Credits to: Telegram user SamuraiTronVC

Note: This whole process will wipe your data.


1. Install Android A12 Beta 1 by OnePlus via Local Upgrade.


2. Once booted into A12 Beta, install the custom Local Update APK that they provide.


3. Install the ColorOS Dowgrade package and reboot.

__________

Here is how to fix the missing network on 9 Pro. I tested it with my own LE2123 EU 9 Pro, but since the A12 DP is working on IN and NA versions as well, should work for everyone. I updated to the latest ColorOS build after step 3, A.08. Don't know if that is required, but do it anyways. The phone has been behaving a bit weird after doing this - e.g. boot loops once, but then it works etc. Not sure if it has to do with steps 4-6, but proceed with caution. Credits to: Myself.

__________

4. Extract the modem.img from the A12 DP using Payload Dumper. I did it already and you can download it here, but feel free to extract the .img yourself.

5. Unlock your bootloader: fastboot oem unlock

6. Flash the modem.img: fastboot flash modem modem.img
 
Last edited:
  • Like
Reactions: TheDXDan

Erkan6779

New member
Jun 1, 2020
4
0

4. İngilizce dilini kullanın.

Tüm farklı milletlerden herkesin iyi İngilizce konuşmadığını anlıyoruz, ancak lütfen deneyin. Gerçekten İngilizce yayın yapamıyorsanız, çevrimiçi bir çevirmen kullanın. Orijinal mesajınızı İngilizce çevirisinin altına kendi dilinizde eklemekte özgürsünüz. (Bu kural gönderilerinizi, profil girişlerinizi ve imzanızı kapsar). Şunları deneyebilirsin: - https://translate.google.com/ veya https://www.babelfish.com/ ya da istediğin birini kullan.
LE2123 coloros sayesinde herhangi bir gelişme var mı?
 

benhidalgo

Senior Member
Dec 13, 2012
98
18
Here is a lengthy way to get this working on a EU 9 Pro with WORKING SIM card. I just completed my first phone call!

Steps to switch from OOS>COS on non-chinese OnePlus 9 Pro. Credits to: Telegram user SamuraiTronVC

Note: This whole process will wipe your data.


1. Install Android A12 Beta 1 by OnePlus via Local Upgrade.


2. Once booted into A12 Beta, install the custom Local Update APK that they provide.


3. Install the ColorOS Dowgrade package and reboot.

__________

Here is how to fix the missing network on 9 Pro. I tested it with my own LE2123 EU 9 Pro, but since the A12 DP is working on IN and NA versions as well, should work for everyone. I updated to the latest ColorOS build after step 3, A.08. Don't know if that is required, but do it anyways. The phone has been behaving a bit weird after doing this - e.g. boot loops once, but then it works etc. Not sure if it has to do with steps 4-6, but proceed with caution. Credits to: Myself.

__________

4. Extract the modem.img from the A12 DP using Payload Dumper. I did it already and you can download it here, but feel free to extract the .img yourself.

5. Unlock your bootloader: fastboot oem unlock

6. Flash the modem.img: fastboot flash modem modem.img
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.
 

DevilSoulll

Member
Sep 3, 2011
9
1
Jed
Guys. I will get my Oneplus 9 pro soon "Chinese version with Global ROM installed" from Aliexpress.

I'm not sure if it will come missing any features or services or not. I'm ok with the Global or the EU versions.

I just need to know if I wanted to flash to EU version, will there be any issues like 5g missing or something. And will the op way of local flashing work just fine?
 

schwarzerfleck

Senior Member
Aug 20, 2015
287
139
Berlin
OnePlus 8T
OnePlus 9 Pro
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.
 
Last edited:
  • Like
Reactions: benhidalgo

car king

Member
Mar 11, 2017
18
0
Here is a lengthy way to get this working on a EU 9 Pro with WORKING SIM card. I just completed my first phone call! Only do this if you know what you are doing and if you are familiar with the concepts of flashing ROMs, using fastboot to flash partitions and possibly using the MSM tool to restore your device in case something goes wrong. I told you.

Steps to switch from OOS>COS on non-chinese OnePlus 9 Pro. Credits to: Telegram user SamuraiTronVC

Note: This whole process will wipe your data.


1. Install Android A12 Beta 1 by OnePlus via Local Upgrade.


2. Once booted into A12 Beta, install the custom Local Update APK that they provide.


3. Install the ColorOS Dowgrade package and reboot.

__________

Here is how to fix the missing network on 9 Pro. I tested it with my own LE2123 EU 9 Pro, but since the A12 DP is working on IN and NA versions as well, should work for everyone. I updated to the latest ColorOS build after step 3, A.08. Don't know if that is required, but do it anyways. The phone has been behaving a bit weird after doing this - e.g. boot loops once, but then it works etc. Not sure if it has to do with steps 4-6, but proceed with caution. Credits to: Myself.

__________

4. Extract the modem.img from the A12 DP using Payload Dumper. I did it already and you can download it here, but feel free to extract the .img yourself.

5. Unlock your bootloader: fastboot oem unlock

6. Flash the modem.img: fastboot flash modem modem.img[/ICODEdid. [/QUOTE] Hello, can you advise if everything is working after you restored the modern.
 

car king

Member
Mar 11, 2017
18
0
here is my test result .

1. update to the Android 12 then roll back to color os.
2.flash the provided link for Modem ..work ok with4G but no 5G im in the US with the USA model so maybe i need to flash my own modem to work ...
3. Flash the tmobile Modem found on XDA and messup my phone bricked it !! but msm save me .


after flashing the Tmo modem im keep getting Qualcomm dump Crush screen, ....


i get that screen when I first time flashes schwarzerfleck's modem . but after reboot it is fine...

also what I notice is every OTA update will kill the modem u will need to reflash the modem to get
data/call working ...


if anyone would like to chat about this please pm ur telegram we can share our experience.
 

Top Liked Posts

  • There are no posts matching your filters.
  • 1
    Sorry to bother you, but is there a way to install one on Color OS?
    1
    No, I'm in Europe, and i would like to try Color OS, but without gapps is useless to me...i have le2120 (china model) with oxygen os and want to be sure if i can get working google apps and services before i install color os
    OK, excellent 👍. After you flash Color OS, head on over to apkmirror and download the play store or any apks of your choice. Color OS has google play services baked. Also get the Gboard, Color OS keyboard is completely for Chinese users.
  • 8
    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
    I did it.. but i dont have 5g anymore any ideas?
    OOS 11.2.3.3
    LE2120
    2
    What about volte and 4g+ (carrier aggregation)?
    4g+ and volte work for me but no 5g
    1
    Can you get the colorOs update for the OnePlus 7T instead of the OS update?
    Not yet released