Power off your device. Depending on your model (e.g., Samsung Galaxy), press and hold Volume Up + Home + Power simultaneously until the recovery menu appears.
Navigate to Settings > Applications > Development and check the box for USB Debugging .
Uninstall pre-installed system apps that consume limited storage and RAM.
By using this updated zip file, you can revitalize an older device with several advanced features:
You will need a robust extraction tool like 7-Zip to manage the firmware and zip files on your PC before transferring them to your SD card.
Run specialized applications that require administrator-level permissions, such as Wi-Fi tethering apps. Preparing for the Rooting Process
Use the volume keys to navigate to "Apply update from sdcard" and press the Home or Power button to select it.
Choose the universal_gb_root_v7.zip file and confirm the installation.