Dear Jakkarin,
Please get SM5300_15.39.38-9-20151023-083759_mx6_cortex.bin from distributor /EMC. Take note this version for testing only and not for installation.
To install this version, ftp to scale / folder, then run putty and type:
chmod 777 SM5300_15.39.38-9-20151023-083759_mx6_cortex.bin
./SM5300_15.39.38-9-20151023-083759_mx6_cortex.bin –ignore-platform
Type reboot in putty after install is complete.
Go to service advance > wireless setting (password 4321) and configure wifi.