Download And Install POSP ROM on Xiaomi Mi 9 based on Android 11 R

Download V12.0.1.0.QFAMIXM: MIUI 12 Global Stable ROM for Xiaomi Mi 9
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Xiaomi Mi 9 (Codename: cepheus) in February 2019. The handset came with Android 9.0 Pie. If you’re a Custom ROM lover and want to flash a Custom Firmware on your Xiaomi Mi 9 (Codenamed: cepheus), then this guide is for you. Now, you can download and install POSP ROM on Xiaomi Mi 9 based on Android 11 R from here. We have also shared the firmware details, download links, requirements, and a full installation guide as well.

Thanks to the Team of Potato Project for developing this ROM compatible with Xiaomi Mi 9. In order to install the Custom ROM on your Android handset, the device bootloader must be unlocked at first and should have installed the latest TWRP Recovery as well.

Xiaomi Mi 9 is powered by a Qualcomm Snapdragon 855 chipset coupled with 6/8GB of RAM and 64/128GB of internal storage. The device came out of the box with Android 9.0 Pie under MIUI 10 and backed by a 3300 mAh battery (Non-removable). As far as the camera concerned, the device has a Triple-camera setup with 48MP + 12MP + 16MP primary sensors and a selfie camera with an 20MP lens. Other connectivity option includes 4G-VoLTE, GPS, Glonass, Bluetooth, Mobile Hotspot, accelerometer, ambient light sensor, gyroscope, proximity sensor, and compass/ magnetometer. etc. The Xiaomi Mi 9 come with a fingerprint sensor under display.

Download And Install POSP ROM on Xiaomi Mi 9 based on Android 11 R

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Now, let’s take a look at the overview of POSP (Potato Open Sauce Project) along with its features.

What is the POSP (Potato Open Sauce Project)?

Potato Open Sauce Project (POSP) is a buttery-smooth Android custom firmware (aftermarket) that is basically based on AOSP (Android Open Source Project). The POSP developers have handpicked the best features around the Android OS and have added their own sauce to it. In a simple way, this ROM aims to deliver some unique features to experience a better Android taste.

Android 11 and It’s Features:

Well, Android 11, Google’s 11th iteration looks similar to Android 10 but with a handful of new features and changes. The update brings notification history, Chat bubbles, Conversation notifications, screen recorder, new media controls, smart device controls, one-time permission, improved dark theme with the scheduling system, app suggestions, wireless android auto, and many more. For more, check out our article Android 11 supported list, Android 11 Custom ROM list, best Android 11 features, and many more.

Steps to Install POSP ROM on Xiaomi Mi 9 (cepheus)

Follow this guide to download all the required files, tools, and drivers along with requirements to get things ready before flashing the firmware.

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Pre-Requirements:

Download Links:

Instructions to Install

Please Note:

Always flash TWRP installer after flashing ROM in order to keep TWRP alive.
  • Then you will need to flash the Android 11 GApps file from the TWRP main menu > go to Install > select downloaded GApps zip file and swipe to flash.
  • After flashing both the firmware and Gapps package, you can reboot your Xiaomi Mi 9 to the system.
  • It will take some time to boot for the first time after installing a Custom Firmware on your device. Have some patience.
  • Now, your device will boot into a new system. Enjoy!
  • Additionally, you can install root on your Xiaomi Mi 9 via SuperSU or via Magisk as well if you want.

We hope that this guide is useful to you and you’ve successfully installed the POSP Custom ROM (Android 11 R) on your Xiaomi Mi 9 (cepheus) device. For any queries, let us know in the comments below.

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