: Reinstalling stock firmware to fix "soft-brick" issues or system loops.
| Error Code | Meaning | |------------|---------| | 403 / 410 | Binary not found – region mismatch or model discontinued. | | 405 | Invalid request format (bad nonce or missing parameters). | | 429 | Too many requests – rate limiting active. | | 500-504 | FUS server side issue (rare, but temporary). | samsung fus server