[S6 Active SM-G890A] Who could root this device please?

Android version: 5.0.2
Baseband version: G890AUCU2AOF3 or G890AUCU2AOF4
Kernel version: 3.10.61-4969613 dpi@SWDD5615 #1
Build number: LRX22G.G890AUCU2AOF3 or LRX22G.G890AUCU2AOF4
Carrier : AT&T

Please help me to root this device.
No firmware on Sammobile yet. Just only OTA update by ATT update software.
This device is too hard...

Best Regards.
:):):)