Requirements:
Terminal emulator (Download via Playstore)
Spreadtrum device
First open terminal emulator
type su
and type this command one by one and wait to finish:
1.)For Boot.img
Type this ⬇
dd if=/dev/block/mmcblk0p16 of=/storage/sdcard0/boot.img
2.)For Cache.img
Type this ⬇
dd if=/dev/block/mmcblk0p18 of=/storage/sdcard0/cache.img
3.)For Fbootlogo.img
Type this ⬇
dd if=/dev/block/mmcblk0p15 of=/storage/sdcard0/fbootlogo.img
4.)For Logo.img
Type this ⬇
dd if=/dev/block/mmcblk0p14 of=/storage/sdcard0/logo.img
5.)For Misc.img
Type this ⬇
dd if=/dev/block/mmcblk0p20 of=/storage/sdcard0/misc.img
6.)For Miscdata.img
Type this ⬇
dd if=/dev/block/mmcblk0p2 of=/storage/sdcard0/miscdata.img
7.)For Prodnv.img
Type this ⬇
dd if=/dev/block/mmcblk0p1 of=/storage/sdcard0/prodnv.img
8.)For Recovery.img
Type this ⬇
dd if=/dev/block/mmcblk0p19 of=/storage/sdcard0/recovery.img
9.)For System.img
Type this ⬇
dd if=/dev/block/mmcblk0p17 of=/storage/sdcard0/system.img
10.)For Userdata.img
Type this ⬇
dd if=/dev/block/mmcblk0p21 of=/storage/sdcard0/userdata.img
This portion is optional since we need this file to complete your backup.
11.)For Wcnfixnv1.img
Type this ⬇
dd if=/dev/block/mmcblk0p7 of=/storage/sdcard0/wcnfixnv1.img
12.)For Wcnfixnv2.img
Type this ⬇
dd if=/dev/block/mmcblk0p8 of=/storage/sdcard0/wcnfixnv2.img
13.)For Wcnmodem.img
Type this ⬇
dd if=/dev/block/mmcblk0p13 of=/storage/sdcard0/wcnmodem.img
14.)For Wcnruntimenv1.img
Type this ⬇
dd if=/dev/block/mmcblk0p9 of=/storage/sdcard0/wcnruntimenv1.img
15.)For Wcnruntimenv2.img
Type this ⬇
dd if=/dev/block/mmcblk0p10 of=/storage/sdcard0/wcnruntimenv2.img
16.)For Wdsp.img
Type this ⬇
dd if=/dev/block/mmcblk0p12 of=/storage/sdcard0/wdsp.img
17.)For Wfixnv1.img
Type this ⬇
dd if=/dev/block/mmcblk0p3 of=/storage/sdcard0/wfixnv1.img
18.)For Wfixnv2.img
Type this ⬇
dd if=/dev/block/mmcbpk0p4 of=/storage/sdcard0/wfixnv2.img
19.)For Wmodem.img
Type this ⬇
dd if=/dev/block/mmcblk0p11 of=/storage/sdcard0/wmodem.img
20.)For Wruntimenv1.img
Type this ⬇
dd if=/dev/block/mmcblk0p5 of=/storage/sdcard0/w
runtimenv1.img
21.)For Wruntimenv2.img
Type this ⬇
dd if=/dev/block/mmcblk0p6 of=/storage/sdcard0/wruntimenv2.img
Note: sdcard0 is your external sdcard
sdcard 1 is your internal sdcard
Congrats you have backup now and can use this for future purposes like Porting Rom and Recovery.
Credits:
https://androidcrib.com
Rowel Crisostomo
My23 group
other not mention