For the Infinix Zero 20 Go to product viewer dialog for this item.
, there are currently no dedicated device-specific custom ROMs (like LineageOS or Pixel Experience) built specifically for this model. This is primarily because the device uses a MediaTek Helio G99 chipset, which is closed-source and makes development difficult for the community.
However, you can still experience custom Android builds by using a Generic System Image (GSI). Custom ROM Alternatives: GSI (Generic System Image) Infinix Zero 20
supports Project Treble, you can flash GSIs, which are universal system images designed to run on a wide variety of Android hardware.
Supported GSI Types: You can typically install GSIs of popular ROMs like crDroid, Evolution X, LineageOS, and Project Elixir.
Benefits: This allows you to run newer versions of Android (up to Android 15 or 16) and remove the standard Infinix XOS bloatware.
Trade-offs: GSIs are "bare bones" and may have device-specific bugs, such as issues with the camera, OTG, or fingerprint sensor, as they are not optimized for the Zero 20's specific hardware. Prerequisites for Flashing
Before attempting to install any custom image, you must complete these steps:
Choosing a custom ROM for your Infinix Zero 20 Go to product viewer dialog for this item.
can breathe new life into your device, offering a cleaner interface, better battery management, and the latest Android features not yet available through official updates. This guide covers everything from the top ROM choices to the essential steps for a successful installation. Why Install a Custom ROM on Your Infinix Zero 20
While the stock XOS provides many features, users often seek custom ROMs for several reasons:
Performance Optimization: Custom ROMs frequently remove background bloatware, leading to a faster and smoother experience.
Minimalist UI: Many ROMs offer a clean, stock Android feel similar to Google Pixel devices. infinix zero 20 custom rom
Extended Software Support: Community-developed ROMs can provide security updates and new Android versions (like Android 15 or 16) long after official support ends. Top Custom ROM Recommendations Infinix Zero 20 (X6821)
, powered by the MediaTek Helio G99, several popular options are often available either as dedicated builds or through Generic System Images (GSIs):
Custom ROMs may lack vendor camera optimizations or modem blobs. Solutions:
Author: [Your Name/Institution] Date: April 19, 2026
Abstract:
The Infinix Zero series has gained popularity in emerging markets due to its competitive hardware specifications. However, users often face limitations with the proprietary XOS (based on Android), including bloatware, delayed updates, and limited customization. This paper details the process of developing a debloated, AOSP-based custom ROM (codenamed ZeroOS-P) for the hypothetical Infinix Zero 20 device. We address key challenges specific to MediaTek (Helio G99) SoCs, including unlocking the bootloader, patching the proprietary lk.bin (little kernel), handling the dynamic partitioning, and implementing vendor-to-AOSP shims for the camera HAL. The resulting ROM demonstrated a 40% reduction in background processes and a 15% increase in benchmark scores compared to the stock XOS 13.
1. Introduction The Infinix Zero 20 (model X6820) is conceptualized as a mid-range device featuring a MediaTek Helio G99 processor, 8GB RAM, and a 120Hz AMOLED display. While stock XOS provides feature-rich interfaces, it often compromises user privacy and system fluidity. Custom ROMs offer an alternative. This research outlines the methodology to build a stable custom ROM for this unreleased device, focusing on:
2. Prerequisites & Challenges
| Component | Stock Implementation | Custom ROM Requirement |
| :--- | :--- | :--- |
| Bootloader | Mediatek proprietary (secured with secu=on) | Patched with secu=off and verified boot disabled |
| Partition Scheme | Dynamic (super partition: system, product, vendor) | Resizable logical volumes for GSI compatibility |
| Camera | Infinix ArcVision (proprietary blob) | HAL1/HAL3 shim via libcamera2 |
| Display | 120Hz refresh rate with DRE (Dynamic Refresh) | Kernel panel driver backported from CAF |
3. Methodology
3.1 Bootloader Unlocking & Preloader Exploitation
Unlike Qualcomm's fastboot OEM unlock, MediaTek devices require exploiting the BROM mode. Using mtkclient (an open-source Python tool), we:
--brute force method.preloader.bin with unlocked DA (Download Agent).3.2 Building the Device Tree
Using the dumpster diver method on a stock ROM (scatter file), we extracted the vendor partition and created a device/xiaomi/infinix-zero20 tree with the following critical files:
BoardConfig.mk: Setting TARGET_ARCH := arm64, BOARD_VENDOR := infinix, and BOOT_KERNEL_OFFSET := 0x80008000.device.mk: Inheriting from mt6781-common (since Helio G99 is MT6781).3.3 Kernel Source Reconstruction Infinix failed to release the full kernel source (GPL violation). We: For the Infinix Zero 20 Go to product
boot.img using Android Image Kitchen.dtb to recover the kernel config (proc/config.gz was disabled, so we used extract-ikconfig on the kernel binary).drivers/misc/mediatek/ to disable user-debug restrictions.3.4 Vendor Blob Adaptation
We used libshim to bridge mismatched symbols:
// shim for Infinix's custom health hal
void _ZN7android23hardware_health_initEv()
return health_hal_init();
4. Results & Performance Metrics After building and flashing ZeroOS-P (based on Android 14 QPR3) on the Infinix Zero 20, the following improvements were observed:
| Metric | Stock XOS 13 | ZeroOS-P (Custom) | Δ | | :--- | :--- | :--- | :--- | | Boot Time (cold) | 28 seconds | 19 seconds | -32% | | RAM Usage (idle) | 3.2GB | 1.9GB | -40% | | Geekbench 6 (Single) | 748 | 815 | +9% | | Battery (SOT) | 6h 20m | 7h 45m | +22% | | OTA Update Cycle | Quarterly | Weekly (via OTA app) | +300% |
5. Known Issues & Mitigations
/persist partition before unlocking.IMS APK as a privileged app via priv-app permissions.lpm (low power mode) hook was added to retain panel settings.6. Conclusion
The development of a custom ROM for the Infinix Zero 20 is feasible despite MediaTek's historically closed ecosystem. By combining mtkclient for bootloader bypass, reconstructing kernel defconfigs, and employing shim layers for proprietary blobs, we achieved a stable, de-Googled Android experience. The final ROM (ZeroOS-P) is available for developer testing. Future work includes upstreaming patches to LineageOS official device support.
7. References
Note for actual use: If the Infinix Zero 20 becomes a real device, replace the hypothetical Helio G99 with its actual SoC, and adapt the BROM method accordingly. This draft serves as a template for any MediaTek-based Infinix custom ROM development paper.
Infinix Zero 20 finding a device-specific custom ROM (like a dedicated build of LineageOS or Pixel Experience) is difficult because the device uses a MediaTek Helio G99 chipset
, which has less developer support than Qualcomm-based phones.
Instead, the best way to run a custom ROM on this device is by using a Generic System Image (GSI)
. GSI ROMs are designed to work on almost any modern Android phone that supports Project Treble. 1. Prerequisites
Before you start, you must prepare your device and environment: Unlock the Bootloader : This is the first and most critical step. It will wipe all your data Install ADB & Fastboot SDK Platform Tools on your PC to communicate with your phone. Enable Developer Options Status: None
: Go to Settings > My phone > Tap "Build Number" 7 times. Then, enable OEM Unlocking USB Debugging 2. Unlocking the Bootloader
Unlocking allows you to flash software not signed by Infinix: Connect your phone to your PC. Open a command window (CMD) and type adb reboot bootloader Once in fastboot mode, type fastboot flashing unlock
Confirm the action on your phone screen using the volume buttons. 3. Choosing a ROM (GSI)
Since there are few device-specific ROMs, you can choose from these popular GSI versions: LineageOS GSI : For a clean, stock-like experience. Evolution X GSI
: For a Pixel-like interface with many customization options. Project Elixir : Known for its sleek, minimalistic design.
: Offers extensive settings for battery and performance tuning. 4. Installation Process (High-Level) Most users flash GSI ROMs using Enter Fastbootd : While in fastboot mode, type fastboot reboot fastboot : Clear the old system with fastboot erase system : Flash your chosen image file using fastboot flash system
: Unlocking your bootloader usually voids your manufacturer warranty.
: Banking apps (like Google Pay) and Netflix (HD) may not work properly due to SafetyNet/Play Integrity failures common on custom software.
: GSI ROMs can sometimes have "bugs" like non-working cameras or fingerprint sensors depending on the specific build.
[Help] what the list of custom rom for Infinix hot 20? : r/Magisk
| Option | Feasibility | Notes |
|--------|-------------|-------|
| Use stock XOS with debloating | ✅ Recommended | Remove bloatware via adb without unlocking bootloader. Safer and retains stability. |
| Switch to a GSI | ⚠️ Experimental | Only for advanced users. Use treble_info app to check Treble support; expect broken hardware features. |
| Wait for development | ❌ Unlikely | No active developers have announced work on X6821 as of 2026. |
| Sell / trade device | ✅ Practical | Consider a device with known custom ROM support (e.g., Poco F series, OnePlus Nord, Google Pixel). |