open zx3 support and download this firmware J100ML_DXU0AOB3_OLC0AOB5 and use odin for flashing
1.Turn off the device
2.Press and hold Volume Down key + Home Key, while pressing these keys then press and hold Power key for a while
3.Release all key when you see ODIN Mode / Download Mode
4.Use Volume Up key to continue
5.Use Volume Down key to cancel ( Restart the device )
