To repack, you often need to extract the contents of an existing payload, modify them, and then rebuild.

Because payload.bin is a binary blob, you cannot simply open it with a standard archive manager like WinRAR or 7-Zip. It is not a standard archive format; it is a structured data stream defined by the . To modify the contents, one must use specialized tools to deconstruct the stream, modify the underlying images, and then reconstruct the stream exactly as the update engine expects.

Swapping modem or regional partitions between different firmware versions. Key Tools for Repacking

PAYLOAD_IN=$1 MOD_DIR=$2 OUTPUT_PAYLOAD=$3