I posted how to root this phone in the Russian Forum, (in Russian and English), here are the steps to follow:
I have the same phone (BlueBo B3000 -MTK6575)
We have to have our mobile perfectly recognized by the computer as "ADB Device", with the controller properly installed, and Debug Mode Enable (connected to the PC with the USB cable).
Download (htt p://ww w.4shar ed.com/zip/fyH9xy DF/Roo tTianji.ht m l) (remove spaces), you need to work in command mode with ADB.
Unzip in "C :/" folder, it will be now "C :/ RootTianji /".
Open a command window (cmd.exe). Then we put (without the quotes) cd.. "until we get "C:>" then put "cd RootTianji" and then just put "adb".
1 -. cmd.exe
2 -. cd ..
3 -. cd .. (again)
4 -. Stop when you get "C:>" prompt
5 -. RootTianji cd
6 -. adb
Now we have to follow these steps to the letter.
Type and hit enter: adb push su /data/local/tmp/su
Type and hit enter: adb push Superuser.apk /data/local/tmp/Superuser.apk
Type and hit enter: adb restore fakebackup.ab (Do not do anything on the phone yet)
Type and hit enter: adb shell "while ! ln -s /data/local.prop /data/data/com.android.settings/a/file99; do :; done" (Now in the command window appear few rows error and that means the exploit is working and now is when you press on the phone and within seconds Restore on mobile as a message that the restoration is completed. If a password is asked do not to write anything, just continue)
Type and hit enter: adb reboot (The phone now reboots itself. Do not do anything until it completely reboot. Might take a little and flashes).
Type and hit enter: adb shell
Now the phone is in root mode and the # prompt appears.
Type and hit enter: mount -o remount,rw -t ext4 /dev/block/mmcblk0p1 /system
Type and hit enter: cat /data/local/tmp/su > /system/bin/su
Type and hit enter: chmod 06755 /system/bin/su
Type and hit enter: ln -s /system/bin/su /system/xbin/su
Type and hit enter: cat /data/local/tmp/Superuser.apk > /system/app/Superuser.apk
Type and hit enter: chmod 0644 /system/app/Superuser.apk
Type and hit enter: rm /data/local.prop
Type and hit enter: exit
Type and hit enter: adb shell "sync; sync; sync;"
Type and hit enter: adb reboot
Your mobile is now root.
If you could try to do all steps from the beginning and from step 9 and 10 run these commands: chown 0.0 / system / bin / su
If the process gets "stuck" in the row of errors (never ends), close and disconnect everything and connect the phone again seeing that everything necessary is in good condition (drivers, cables, files), then proceed to retry processes from the beginnin. (cmd.exe).
If you dont understand something just ask.
This guide was originally made for Tinji Mobile N9000 i9220, but when I realized it was the same processor as mine (B3000 - MT6575), I decided to try it, and for my surprise, it worked!
Please be careful and use this information at your own risk
Sorry if I wrote something bad or strange. Bye