Okkk.... I'm changed my software on my galaxy s6 few times and everything goes fine, but today he freeze when he reboot after installation and show just black screen. The problem is that my phone doesn't won't go in TWRP mode again, just in downloading mode. So, I tried to flash stock over Odin and he faild at the beginning( NAND Write Start!! ,<ID:0/005> FAIL!,<ID:0/005>,<ID:0/005> Complete(Write) operation failed.,<OSM> All threads completed. (succeed 0 / failed 1). If someone could help me, please do that.. Tnx and sorry for bad english, I'm new here, first post.