If you own MTK Phone ( MediaTek Phone ) and want to customize it or to update it to new version of android you really need to backup to ROM. Here is the guide to backup original ROM comes with original installation.
This guide will teach you to backup stock chinese rom to pc for later use in case of any thing goes wrong during updating and customizing.
Step # 1 : Download and install USB drivers.
Step # 2 : Download and extract MTK Tools to Desktop.
Step # 3 : Enable USB Debugging in Setting > Developer options
Step # 4 : Connect Phone to PC.
Step # 5 : Launch MTK tools.
Step # 6 : Click Root Button on MTK Tools Window. ( This will give MTK tools root access to read system files.)
Step # 7 : Press yes on Pop up
Step # 8 : Now go to root,backup,recovery tab.
Step # 9 : Now click on Backup. ( if you want to backup user data check this box)
Step # 10 : When backup complete go to MTK Droid Folder to confirm the backup.zip files.
Hope this help if you have any question ask me here.