This is for those who need it.i have been lookin still many peoples not able to set this problem..this thread for those peoples.
KG300 auto off solution
1. download devin too attached
2. download special reset file attached.
3 download flash file attached.
4 download flash software attached.
5. cable pinout attached.
6. connect handset in devin tool..when connect select reset file and reset bluetooth,security,and phone reset etc.
7.only after reset your phone will be all ok...but its better to full flash.
8. full flash using any professional software or using leo.
9 after full flash 2945#*# and do factory reset.