FW OF ANDROID TV BOX KT-621

Please download batch tool from below link, 

http://www.mediafire.com/file/qfb5x041muxg7dt/TV_box_batch_tool_.zip

Please download the FW from below link, 

http://www.mediafire.com/file/44xy72lhcxblaa7/rk3229_5.1_MX4N_SSV6051p_ZhuoXinZhiNeng_KT-747_ESSENCORE_20170314_V003.zip 

If the product serial no is 7473171100401 to 7473171100900, then please download the FW from below link, 

https://drive.google.com/open?id=16DwpLTPDgI2ZHP6L9JUWVq9HiN2HaXFR