Change or Install Custom ROM on Android mobile

Change the operating system (OS) in Android typically have some risks so try it  your own risk.

Change OS install Custom ROM in Android:

Important Note: Changing the OS on your Android device can have risks and may void your warranty. Make sure to research and follow instructions specific to your device model and be prepared for potential data loss. It's recommended to back up your important data before proceeding...

1. Unlocking bootloader: 

Most Android devices have locked bootloaders to prevent unauthorized OS modifications. You would need to unlock the bootloader by following instructions specific to your device, which usually involves enabling developer options, enabling OEM unlocking.

Enable devoloper option :

• --> Open the Settings app on your Android.

• --> Scroll down and locate the "About phone" or "About device" option.

• --> In the "About phone" or "About device" menu, find the "Build number".

• --> Tap on the "Build number" option multiple times (usually seven times) quickly. You will see a message like "You are now a developer!" or "Developer mode has been enabled."

• --> Go back to the main Settings menu, and you should now find the "Developer options" or "Developer mode" listed.
• --> Tab developer option and enable OEM Unlocking .

After using specific commands or tools.

2. Rooting your device (optional): 

Rooting gives you administrative access to your device and is often necessary to install custom ROMs. It allows you to make changes that are typically restricted. Research the specific rooting process for your device model and follow instructions carefully, as it can also have risks.

3. Choose a custom ROM: 

There are various custom ROMs available for different Android devices, such as LineageOS, Paranoid Android, or Resurrection Remix. Research the ROMs compatible with your device, considering factors like stability, feature set, and community support. Download the desired ROM onto your computer.

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4. Installing a custom recovery: 

The on custom recovery, such as TWRP (Team Win Recovery Project), allows you to install custom ROMs. Flash the custom recovery onto your device using specific instructions for your device model.

Install TWRP:

1. --> Enable USB debugging in the Developer Options. This option allows your device to communicate with your computer.
2. --> Download and install the Android SDK platform-tools on your computer. This package includes the necessary tools to interact with your Android device via command line.
3. --> Download the TWRP image file that is specifically built for your device model from the official TWRP website or a reliable source.
4. --> Connect your Android device to your computer using a USB cable.
5. --> Open a command prompt or terminal window on your computer.
6. --> In the command prompt or terminal, navigate to the directory where you installed the Android SDK platform-tools.
7. --> Boot your device into Fastboot mode or bootloader mode. To do this, turn off your device, then press and hold the appropriate key combination (usually Power + Volume Down) to enter bootloader mode. 
8. --> Once in Fastboot mode, verify that your device is recognized by the computer by running the command: `fastboot devices`
9. --> Next, flash the TWRP image file using the following command: `fastboot flash recovery /path/to/twrp.img` (replace `/path/to/twrp.img` with the actual path to the downloaded TWRP image file on your computer).
10. --> After the flashing process is complete, reboot your device by entering the command: `fastboot reboot`
11. --> Your device should now boot into TWRP recovery.

5. Flash the custom ROM: 

Power off your device. Boot into recovery mode by pressing specific key combinations (e.g., power button + volume up). Once in the custom recovery, locate the option to install a zip file, and select the custom ROM file you previously downloaded. Confirm the installation and let the process complete.

6. Reboot and set up: 

After flashing the custom ROM successfully, reboot your device. It may take a while for the first boot, so be patient. Follow the initial setup instructions to configure your new operating system and customize it to your likings.

Note: The process can vary depending on your device model, manufacturer, and Android version.