Extracting recovery from Android phones

Recovery files downloaded from the Internet have been installed to the phone. As to what this little recovery was all but unknown. Can you make a recovery? Because of the more functional ClockworkMod (CMW) on the official website does not provide my model download, how to make the online version of it?

Let's find a recovery to study.

Recovery.img is an image file that recalls the floppy image files that were previously made. Find a tool that can open the image (WinImage, UltraISO), open with three files: Bootimg-header.bin, Bootimg-kernel.bin, bootimg-ramdisk.gz. As a matter of literal meaning, a header and kernel binary files, memory disk compressed files.

Search for a self-made recovery tutorial, the first two should be the kernel, Bootimg-ramdisk should be recovery program. According to the tutorial so-called transplant, it is the official kernel plus the ramdisk of CMW. The question was put aside.

Pick up the recovery of your phone first. My phone model is v880+, find the official website support download. Three files found: One driver, one TF card upgrade bin file, one (on PC) one-click Upgrade files. Binary file (bin) No way to do, one-click Upgrade is a separate EXE file, but do not know how to untie, first give up.

Try to extract it from your phone.

Find the Online debugging tool (ADB) can be used to backup mobile phones and other operations. Find the official driver installer installed, after successful installation, you can find in the Device Manager ADB interface There is a ZTE composite ADB interface. In addition, there is a Adb.exe file in the installation folder.

shift+ Right-click in the empty space of the File Manager and select "Open Command Window Here".

Turn on the developer debugging options for your phone.

Execute ADB, you can see some help information, ADB devices look at the connection is not.

View disk partition information adb shell, enter the phone's shell, get Permissions # su, #cat/PROC/MTD can see the partition. It seems that different devices to view the partition method is not the same, the specific partition is also a matter of what is not clear.

The partitions are as follows:

# Cat PROC/MTD
Cat PROC/MTD
Dev:size erasesize Name
mtd0:00500000 00020000 "Recovery"
mtd1:00500000 00020000 "Boot"
mtd2:00180000 00020000 "Splash"
mtd3:00080000 00020000 "Misc"
mtd4:02580000 00020000 "Cache"
mtd5:0dc00000 00020000 "System"
mtd6:0a280000 00020000 "UserData"
mtd7:01500000 00020000 "OEM"
mtd8:00180000 00020000 "Persist"

To recovery the guide out:

# cat/dev/mtd/mtd0 >/sdcard/recovery.img

It is exported to the Recoery.img file in SDcard. Then pull it to the computer: ADB pull/sdcard/recovery.img e:\android\v880plus-recovery.img

Extracting recovery from Android phones