All credit goes to idone. Not my work. Just sharing here.
You MUST BE ROOTED.
Download sqlite editor. Open sqlite editor, select files. Then
Select carriers. The last 2 lines (APN2LTE internet) and (APN2 EHRPD internet) you will see (default,mms), add ,dun.
It will look like this
Make changes in both lines, reboot, enjoy.