I tried
Unlock Bootloader, All Wipe, Format Data in TWRP
flash 6.9.29 then reboot
At this point, no problem, SIM works.
Download SuperSu Stable zip and flash in TWRP
after reboot SIM can't detected("No SIM Card")even SIM slot1 or 2.
but My SIM works on my another phone(C6833). I don't know why...