How can I manually add DNS Servers to the Mobile connection on WR21?

Digi TransPort WR (Series)
,
1

I have gone into the PPP settings and added my DNS servers there but upon reboot, the servers are the same as before, not the ones I want.

2

make sure you’re saving the changes.

transport homepage -> administration -> save command -> ‘save all’ button.

3

I have done this. I have also done a reboot after saving it and it still does not come up.