Shenzhen JC Innovation Device Co., Ltd. (hereinafter referred to as “JCID”) is a subsidiary of JCID&AiXun Group Company, was founded in 2013 by a group of interesting guys with enthusiasm and high education.
JCID focuses on providing complete solutions for the maintenance and repair of smart phones, such as nand expansion, screen data repair, true tone/vibration/touch/brightness repair, battery data repair, fingerprint data and facial recognition, etc.
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Nand Restoring Testing Fixture
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EEPROM Chip Programmer
U70 Gen2 UFS Programmer For Android UFS/eMMC/ISP Nand Repair 
EM03 Gen3 CNC Smart Grinding Machine Polisher for Nand Chip and CPU Polishing- JCID
17 Series SIM Slot Grinding Kit High-Precision Milling Tool Set for EM02/EM03 Grinding Machine - JCID
FOG Screen Intelligent Test Card AI-Powered Display Identification Tool - JCID 
USB Drive Conversion Kit NAND Chip Android Phone Repair Tool - JCID
17 Series Tag-on Front and Rear Camera Repair Flex Cable - JCID
The rollback package is based on ColorOS 6.1, which is a earlier version of OPPO's custom skin. This version is known for its simplicity, ease of use, and stability. By downgrading to this version, users can expect to experience:
The OPPO A9 2020 “rollback package exclusive” offers a way to revert problem‑causing updates to a stable ColorOS build, but it isn’t a casual download: these packages are often limited to specific models or issued through service channels to prevent accidental bricking or security bypass. Below we explain what rollback packages are, the risks of downgrading, and a safe, step‑by‑step approach to restoring your device.
The most reliable and only officially recommended way to roll back your software is to visit an OPPO Service Center OPPO Global Community Expert Assistance: oppo a9 2020 rollback package exclusive
Because standard flashable firmware packages often fail when attempting to downgrade, using an is essential to prevent data corruption or bricking your device. Why Roll Back Your Oppo A9 2020
Frequent app crashes or system freezes after an update. The rollback package is based on ColorOS 6
The OPPO A9 2020 rollback package is a specialized, often exclusive firmware file designed to downgrade the device from ColorOS 11 (Android 11) to ColorOS 7 (Android 10) to resolve performance issues or system instability. While local installation via the .ozip file is possible, using the official OPPO System Upgrade Tool or visiting a service center is recommended to prevent device failure and data loss. For official assistance and resources, visit OPPO India Community OPPO System Upgrade Tool | OPPO Global
A rollback package, also known as a downgrade package, is a software package that allows users to revert to a previous version of their device's operating system. In the case of the Oppo A9 2020, the rollback package would enable users to downgrade from a newer version of ColorOS to an earlier one. Below we explain what rollback packages are, the
If you have updated and regret it, you need the . This is not a standard OTA update; it is an official, but hard-to-find, downgrade tool that allows you to revert from Android 11/ColorOS 11.1 back to Android 10 (ColorOS 7.1).
You preferred the user interface or specific features of the older ColorOS version. 🛑 Important: Read Before Proceeding
If you have recently updated your OPPO A9 2020 to ColorOS 11 (based on Android 11) or a newer beta version and find yourself regretting it—struggling with battery drain, laggy animations, or missing features you loved in ColorOS 6 or 10—you are not alone. The good news is that an exists to take your device back to a stable, faster version of the OS.
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