dd if=boot.img.lz4 of=boot.lz4 bs=1 skip=4 # sometimes skips 4-byte header lz4 -d boot.lz4 boot.img file boot.img Should output: Android boot image, kernel, ramdisk, ... or data 5. Next steps (optional) Now you can unpack the kernel/ramdisk:

Here’s a concise guide to extract boot.img.lz4 (a compressed boot image from many modern Android devices, especially those using LZ4 compression). First, confirm it’s LZ4 compressed: