How to Manually Update Android OS from Nougat to Oreo

Android users looking to upgrade their devices from the older Android Nougat (version 7.0 to 7.1.2) to the more recent Android Oreo (version 8.0 to 8.1) can do so manually. While this process offers more control, it also comes with risks. Here’s a comprehensive guide on how to proceed safely.

Compatibility and Preparation

Before embarking on the update, it's crucial to verify that your device is supported. Some devices might not be compatible with Oreo, so check with your device manufacturer or search online for community support.

Backup Your Data

Data loss can be a severe consequence of a failed OS update. Therefore, always back up your contacts, photos, apps, and any other important data. Many devices offer built-in backup methods, while third-party apps can also provide additional security measures. Regularly backing up ensures that your data remains safe during the update process.

Downloading the Official Firmware

The next step is to obtain the official Android Oreo firmware for your device. This can typically be found on the manufacturer’s website or reputable sources like XDA Developers. Make sure to download the exact version compatible with your specific model and not a beta version.

Preparation for the Update

Once the firmware is ready, prepare your device for the update. Enable Developer Options to gain access to more advanced features and commands necessary for flashing the firmware.

Enabling Developer Options:

Go to Settings About Phone and tap on Build Number seven times to enable Developer Options. Once Developer Options are enabled, go back to Settings Developer Options. Toggle on USB Debugging.

In some cases, you may need to unlock the bootloader. This varies by manufacturer and could void your warranty, so proceed with caution and follow specific instructions from your device’s manual or manufacturer’s website.

Installing Necessary Tools

To flash the firmware, you’ll need to install some tools on your PC:

ADB Android Debug Bridge: A command-line interface that provides communication between the computer and the device. Fastboot: Used to flash specific partitions of the firmware directly. Specific Drivers: Ensure that your device’s drivers are installed and up-to-date on your PC.

Download and install these tools on your computer. Once installed, connect your device to your PC via USB and ensure that USB debugging is enabled.

Flashing the Firmware

Now, you can begin the firmware flashing process:

Open a command prompt (Windows) or terminal (Mac/Linux). Navigate to the folder where you downloaded the firmware. Flash the firmware using the following commands (replace [partition] and [] with the actual partition and filename):

fastboot flash [partition] []
fastboot reboot

This command sequence will reboot your device into bootloader mode and flash the necessary partitions, eventually rebooting it.

Finalizing the Update

After the flashing process, your device will reboot. It might take a few minutes for the first-time boot. Once your device is back in working order, set it up as new or restore from a backup if necessary.

Important Notes

Risk of Bricking: manually updating your OS carries the risk of bricking your device. Proceed with caution and ensure you follow instructions specific to your device model.

Warranty: unlocking the bootloader or flashing unofficial firmware can void your warranty, so proceed at your own risk.

Research: for detailed instructions and troubleshooting tips, look for device-specific guides and forums. These resources can provide valuable insights and additional support.

If you are not comfortable with these steps, consider checking for official Over-the-Air (OTA) updates through your device's settings or visiting a professional service.