[Redmi Note 9 ROMs, Kernels, Recoveries, & Other De] kija555:
Your warranty is now void, by installing any custom ROM, kernel,firmware,recovery and/or any other image.

If you follow this guide and break your phone then it will be your fault!

Phone control:

Hold power button to turn off/on.

Hold Volume down and Power button to enter Fastboot mode.

Hold Volume up and Power button to enter Recovery mode.

Tip: if you get boot loop or phone is misbehaving just hold the volume button,

or it might just restart, if nothing happens let go and quickly hold the button again.

Unlock Bootloader:

1. Download the Miflash Unlock app to PC from: https://en.miui.com/unlock/download_en.html

2. Sign in with your Mi Account, do the captcha then send sms verification.

3. Shut down your phone, and enter Fastboot mode.

4. Connect your phone to PC and click "Unlock" in Miflash app.

Wait 168 hours (7 days) and do it again from step 2. If it fail just do it again.

Driver issues:

Open MiUsbDriver in Miflash Unlock folder, and do step 3 in Unlock Bootloader.

Alternative drivers:

1. Download XiaoMiFlash from: https://xiaomiflashtool.com/category/download

2. Open XiaoMiFlash click chip tab to select phone chip, click driver tab to install drivers.

If you get error make a folder named "log" in MiFlash folder, then do it from step 2.

Recovery:

Search for your phone ideal recovery: TWRP, SHRP, OFRP, PBRP, RWRP...

Ideal is the latest, or the suggested with the rom you want to flash

If not working try an older or a newer one, if you cant get out of bootloop do a Fastboot Recovery rom.

Fastboot Recovery img:

1. Download Android SDK Platform Tools from: https://developer.android.com/studio/releases/platform-tools

2. Inside the platform-tools folder, type in "cmd" in the url in file explorer then Enter to launch the Command Prompt for the folder instead cd.

3. Connect your phone to PC in Fastboot mode.

A. boot device to Recovery Mode with your_recovery(temp): fastboot boot your_recovery.img

B. flash the your_recovery file to device recovery partition(perm): fastboot flash recovery your_recovery.img

C. flash the your_recovery file to device boot partition(perm): fastboot flash boot twrp.img

4. boot device to Recovery Mode: fastboot reboot recovery

If you get a bootloop do it again from cmd or Fastboot Recovery rom, if you cant flash Recovery and get into bootloop try a older rom.

Tip: you can drag the file to cmd.

Fastboot Recovery rom:

1. Search for your phone from: https://xiaomirom.com/en/series/

2. Select the rom you want

____1____2__3__4__5______6____________2_

V13.0.3.0.|S|JO|EU|XM_20221130.0000.00_|12

1 Miui ver. 2 Android ver. 3 Phone model 4 Region 5 Sim lock 6 Date

This is a Redmi 10X 4G / Note 9 Stable Fastboot ROM

Miui 13,Android12,Merlinx,Eu region,Unlocked sim, made in 2022.11.30

3. Extract the rom and find the flash_all file

4. Connect your phone to PC in Fastboot mode.

5. In cmd: fastboot flash_all.bat

Tip: you can drag the file to cmd.

Flash rom:

O Make a backup for evertting in the phone you want.

1. Boot to Recovery.

O Make a backup for anyting in the system (MIUI, NVRAM, NVDATA, IMEI) to SD card.

2. Flash rom

3. Wipe data/factory reset, cache, Dalvik cache, dont wipe system(the rom you just flashed)

4. Reboot

If you get a bootloop do it again from Recovery mode>Fastboot Recovery img>Fastboot Recovery rom.

You need to wipe data if you go with a major update or dont want windows like bugs.

Pro tip take out sim card so you dont need the pin code, and it wont eat into your data plan.

My flash guide:

If you want to flash Miui rom you can do the above.

If you want to flash ProjectElixir AOSP rom you need to keep some things in mind:

For Redmi Note 9 (merlin) ProjectElixir-3.4-merlinx-13.0-20221228-1840-OFFICIAL.zip is the latest rom.

But it doesnt work so you need ProjectElixir-3.3-merlinx-13.0-20221127-1243-OFFICIAL.zip.

If you are from V12.5.6.0.RJOEUXM like me you need to flash a V13.0.3.0.SJOEUXM to upgrade the firmware.

As TWRP is not suggested for this and SHRP_v3.1_stable-Official_merlin-1628943443.img is the latest but not A13 recovery.

Then flash ProjectElixir-3.3 but without reboot as it will replace your recovery with MIUI recovery.

If your V13.0.3.0 rom gives an error and cant flash it, get another one like:

13.0.2.0.SJOMIXM or 13.0.1.0.SJOMIXM or V13.0.3.0.SJOMIXM or V13.0.3.0.SJOIDXM

After you flashed the V13.0.3.0.SJOEUXM rom you need to downgrade to V12.5.6.0.RJOEUXM to flash Recovery img.

AOSP will not have a camera app, i use Open Camera from Play Store, if you backed up your google account you can,

recover files from drive, contacts, wifi password and other passwords, quickly reinstall apps from before.

I wrote this guide mainly for myself to not forget it if i need it again, but share it in hope of saving others hours if not days.