Once you have downloaded your firmware file (usually ending in .tar or .tar.md5 ), follow these steps:
SamMobile is one of the most trusted archives for Samsung firmware. samsung galaxy s3 firmware download
There are several scenarios where a fresh firmware installation is necessary: Once you have downloaded your firmware file (usually
Power off your S3. Hold Volume Down + Home + Power simultaneously. When the warning screen appears, press Volume Up to continue. press Volume Up to continue.