can i do a home unlock without the code from the network operator?
if it's possible , please post a "how to" .

Thanks !

It's not possible.
Use GSM PhoneSource - When Only The Best Will Do

Yes, but you will have to purchase the code from an unlocking service. Horizon in my signature gives members on this forum a discount.

E-

I second Horizon Wireless, also in my Sig.

MFI Multiloader
it is said this software can unlock 8*** series
i am not sure if it can unlock 7***

It can't. That's a silly rumor, nothing more. The basic encryption used on the BB OS I'm told is 1024-bit. Unless you're running the MFI Multiloader on a Cray Computer, it's not happening.