Go to download section-firmware-W660 and download this 2 files:
MAIN: W660_R8BB001_MAIN_GENERIC_FY_RED52
FS: W660_R8BB001_FS_APAC_RED52 and than go to download section-custom files - W660 and download this
CUSTPACK: HB1-06_Gen_CDA102568_101_R8A_GENERIC_APAC