[Q] galaxy note II dual sim mtk6577 bricked topic

hi to all, recently i buyed a chinesse GN2 with dual sim everything was fine, i insert my sim card and i don't have network, ok no problem say to me, maybe i can turn on the wi-fi, well the phone freeze when i turn on the wi-fi, i had to remove the battery no response for any button, i try to backup my rom but something go bad and i lose my chinesse Galaxy, i can't enter into a factory default or recovery mode, the phone only show samsung screen then boot again...so it's a boot loop.

any help?