I am using a Huawei E3131b 3G dongle to connect to internet. I'm having troubles setting up DNS servers that persist across reboots.
Manually specified DNS servers are not used at all if I use the bundled application that came with the dongle to connect to internet (which identifies the dongle as a modem and connects as a virtual ethernet adapter.)
However if I use windows 7's inbuilt software tools (which identifies the dongle as mobile broadband) then I can use other DNS servers apart from the ones allotted by the ISP. I can go and change them in the IPv4 settings. But there's a catch here. These dns settings do not persist across reboots or if the dongle is plugged out and then re-plugged. I've to change the DNS manually every time this happens.
So I was wondering if there was a method or a software that will "lock" my dns entries and save them across reboots or if there is a way to set a system-wide dns address so that only specific dns servers are always queried from my laptop irrespective of the adapter or the network interface i'm using to connect to the internet?