Open the adb folder on your PC. Hold Shift , right-click an empty space, and select or Open PowerShell window here . Type the following command to verify your connection: adb devices Use code with caution. (Accept the prompt on your phone screen if it appears). Boot into fastboot mode: adb reboot bootloader Use code with caution.

Disclaimer: Proceed at your own risk. Incorrectly executing these steps can result in a soft or hard brick. Step 1: Enable Developer Options and USB Debugging Open > My Phone on your Infinix device.

: Remove system apps that drain RAM and battery background resources.

The first boot can take anywhere from 3 to 10 minutes. Sit back and wait for the welcome setup screen to appear. Troubleshooting Common Issues Issue 1: Device is Stuck in a Boot Loop

Installing a custom ROM on your Infinix Zero 20 can unlock its true potential. It delivers a cleaner user interface, better battery life, and the latest Android version updates long after official support ends. Why Install a Custom ROM on the Infinix Zero 20?

You will need a Windows, Mac, or Linux computer to execute commands. Download and install the latest .

Customization junkies who still want a stable Pixel-like baseline.

Under the same Phh-Treble Settings menu, look for custom biometric patches specifically tailored for under-screen scanners if your sensor fails to register.

Depending on the GSI builder, carrier-specific features like Wi-Fi calling might require manual patching in IMS settings.

Switching from stock XOS to a custom ROM transforms your daily smartphone experience. Here are the primary reasons why users make the switch:

❌ No stable custom ROMs are publicly available for the Infinix Zero 20 (X6821).

The Infinix Zero series includes the Zero 20 (released 2022) and the Zero 30 (released 2023). This report focuses specifically on the Zero 20 (model number X6821 ). Users often confuse the two, so verification of the model number is critical before proceeding.

Since there is no official TWRP for the Zero 20, you must flash the ROM via Enter FastbootD : Boot into fastboot again ( adb reboot bootloader ), then type: fastboot reboot fastboot

Do you prefer a or a highly customizable UI ? Are you planning to use banking apps on this device?

Confirm the action on your phone screen using the volume keys. Step-by-Step Installation Guide

If you flash a GSI like , LineageOS , or DerpFest , you can expect the following enhancements over the standard XOS:

: Access to newer Android versions (like Android 14, 15, or 16 ) that the manufacturer may not officially provide. Known Issues and Considerations