Move the downloaded Firmware (ZIP) and GApps (ZIP) to your phone's internal storage or SD card.
Go back to the main menu, select Install , locate the Android 5.1 ZIP file, and swipe to flash. samsung galaxy s3 i9300 5.1 firmware download
Available on the official Resurrection Remix archives or XDA Developers threads. 3. Google Apps (GApps) Move the downloaded Firmware (ZIP) and GApps (ZIP)
Before you begin the download and installation process, ensure you meet these requirements: locate the Android 5.1 ZIP file