Repacking is the mirror image but much more complex. The tool must rebuild a byte-for-byte identical (or functionally identical) image that the bootloader will accept.
Download the Unpack Repack Tool V2.0 from the official repository (get it from trusted developer forums like XDA-Developers, not random file hosts). Extract the ZIP to a folder like C:\UnpackRepackV2\. Unpack Repack Tool V2 0
Manufacturers lock bootloaders, but even unlocked devices require careful manipulation of partition images. The primary use cases include: Repacking is the mirror image but much more complex