1, download bootimg.exe and put it on drive D.

2. Decompress boot.img from the rom package to be decompressed and put it in the bootimg folder directory.

3. Run the cmd system command, enter the D: bootimg directory (D: then cd bootimg stands for d disk), and then enter bootimg-unpack-bootimg. Unlock the bootimg file to get two files, the kernel and the ramdisk.gz and ramdisk.gz files can be deleted.

4. Rename the kernel file to zImage.

5. Find an old version of the kernel package, and then replace the files with the same name in the old version with Zimmage and bcm4329.ko respectively. The paths are: kernel/zImage and system/lib/modules.

6. The old kernel can be renamed at will. META-INF in the brush package contains the script of signature and brush. The com/Google/Android/updater-script file is the text displayed when sliding on the computer. When you open it with Notepad, the ui_print ("") bracket can be changed into random text, and then you can close the save and scan it in.