G355 samsung why not connect

WHEN I TRY TI CONNECT SAMSUNG SM-G355H IT ALWAYS SHW-

JTAG Connection is not supported for this device
Z3X EasyJtag Software ver. 2.0.7.0
Loading eMMC Addon Firmware… IO: 2800 mV
Box S/N: 0E0E0E144423B918, ,FW Ver.: 01.52
Warning: CMD Pullup Level (154 mV) too low , check cables etc.!
CMD Active Level:577 mV
HiPower™ mode is off!
Can’t init device, Reason: CMD Timeout Error
Done.

Z3X EasyJtag Software ver. 2.0.7.0
Loading eMMC Addon Firmware… IO: 2800 mV
Box S/N: 0E0E0E144423B918, ,FW Ver.: 01.52
Warning: CMD Pullup Level (144 mV) too low , check cables etc.!
CMD Active Level:907 mV
HiPower™ mode is off!
Can’t init device, Reason: CMD Timeout Error
Done.

WHERE I’M WRONG ? PLZ GUIDE EASY JTAG TEAM ?