Once you download the firmware (usually a .zip file containing .tar.md5 files), you need (Samsung’s proprietary flashing tool).
Before downloading, understand these three things: sammobile firmwares
But what exactly are "SamMobile firmwares," and why should you use them instead of waiting for an OTA (Over-the-Air) update? Once you download the firmware (usually a
However, for the casual user just wanting a one-time unbrick, the free tier’s slow speed is painful. In that case, use to fetch the same firmware directly from Samsung, then refer to SamMobile for guides and CSC information. for USA unlocked
Search by the (e.g., SM-G998B ) and then choose any CSC from the same hardware region (e.g., for India, choose INS; for USA unlocked, choose XAA).