Oppo A9 2020 Custom Rom Work May 2026

Oppo A9 2020 Custom ROM Work

Overview

The Oppo A9 2020 (released as Oppo A9 and A9s in some regions) is a budget-to-midrange phone with a Qualcomm Snapdragon 665 (or MediaTek variants in some markets), 4–8 GB RAM options, and an unlockable bootloader on many regional builds. Installing a custom ROM replaces the stock ColorOS with a third‑party Android build (e.g., LineageOS, Pixel Experience, HavocOS) to gain near‑stock Android, extended features, later Android versions, or performance/tweaks.

  1. Will installing a custom ROM void my warranty? Yes, installing a custom ROM will void your warranty. Proceed with caution and make sure you're aware of the risks.
  2. Can I revert back to the stock ROM? Yes, you can revert back to the stock ROM by flashing the original firmware using a tool like SP Flash Tool or Fastboot.
  3. What are the risks of installing a custom ROM? The risks include bricking your device, losing data, and potentially causing system instability. Make sure to backup your data and research the ROM thoroughly before installation.

Rooting: While standard rooting is blocked, some advanced users have attempted methods using patched boot images through ADB, though this remains risky and complex. Device Quick Info Processor Snapdragon 665 Max OS ColorOS 11.1 (Android 11) Unlock Status Permanently Locked (for most regions) oppo a9 2020 custom rom work

Before you download a single file, you need to know the hard truth: Oppo has made official bootloader unlocking nearly impossible for most users. Oppo A9 2020 Custom ROM Work Overview The

Why?

  • Some features need proprietary blobs from stock ROM — look for ROM builds that include necessary blobs or instructions to extract and flash them.

The Best Setup Right Now (October 2025): Will installing a custom ROM void my warranty

The GSI Shortcut (Easiest Attempt)

Because the A9 2020 has Project Treble support, you can try a GSI (e.g., from PHHusson). Steps: