: Choose the specific operation (Flash, Unlock, or Repair) and follow the on-screen prompts to complete the task. Important Considerations Technical Expertise Required
Download and install the official .
One of the most practical quality-of-life additions in this build is the integrated firmware downloader. The tool now pulls official Samsung firmware from a CDN directly into the software cache, automatically matching the required binary version. This minimizes the risk of “SW REV CHECK FAIL” errors—a common nightmare caused by trying to downgrade binaries. Z3x-mst-tool-v2.6.1.4
Power off the phone, hold Volume Down + Power + Home (or Volume Down + Volume Up while plugging in the USB cable on newer devices) until the warning screen appears, then press Volume Up . : Choose the specific operation (Flash, Unlock, or
“MST Handshake Failed - Error 0xE0”