k330 - Can update firmware / unlock / apply patches?

Hello. So..this is my problem: i have to reflash and unlock a k330 phone, BUT:
- i read on Google that is an ODM phone and it can't be flashed the simple way just as k750i for example
- i heard that i can unlock it by Setool 2 for free because of a software bug or something like that, but in Setool lite 2 i can't find k330 in model list

I didn't find nothing exactly to fix my problem, so please, can you tell me how to reflash it, unlock it , adding patches (if i can) and other things like that.
I know that i can unlock it by paid services, but i want to know if i can exploit that bug in my interest. So could you help me? Thanks in advance. :a010