Need help! C6833 757 can't connect to pc flashmode to flash FTF
My C6833 LTE can't connect to flashmode to flash FTF.
I try with sony update service and Flashtool 0.9.15.0, all don't recognize my z ultra.
I can connect to fastboot mode by pressing volume up.
But can't connect to flashmode by pressing volume down.
Firmware version is 14.3.A.0.757
Kernel version is jackie099@ubuntu #1
Thank for any feedback.