HELP ME FOR htc desire 816 flashing. topic

customer bought it from chaina-so when on chineese logo UNICOM shown.

need to change this logo is the problem-phone now working -details as below

android version 4.4.2
sense version 6.0
software number 2.06.1402.2
baseband version 1.13.3230.19.29_13.18.3230.00d_f

its other details as below

unlocked
A5_DUG PVT SHIP S-ON
HBOOT-3.19.0.0000
RADIO-1.13.3230.19.29
OPEN DSP-V24.2.2.00541_A5DUG_CRC.0311
OS-2.06.1402.2
EMMC-boot 1536mb
aug 22 2014

multi tool details as below

model:A5_DUG
IMEI:3522------619
BUILD:2.06.1402.2
CID:HTCCN703
HBOOT:3.19.0.0000
MID:0P9C70000
SECURITY:eek:N
REGION:CU

HELP ME FOR flash file

thanks