I know this is not something new im posting here. All credit goes to the developer. If u have a u8800-51 impulse 4g and u cant find a way to root it or u just dont have a computer or you are just the kind of person like me that likes to do everything or mostly everything without a computer.
Try at your own risk me nor the developer are responsible for any damages.
This method worke for me. But doest necesarly means it has to work for you.
you have been warned.
Download and install poot.apk and ministroll.apk
run poot.apk and it will automatically open ministro ll.apk
Ministry will then ask to download some lib accept and when its finished downlding it will open poot again
You will have two options select the poot option which i think is the first one
when its finished
It will say some error number
close it and reboot
Download and install superuser and root checker
run root checker and see if your rooted
If not keep earching other methods.