Helo.
I have an ATT LG G2 and I came across this thread. I know it's for the S5, but blocking ads is software-related, so I ask.
I use an app from yahoo, called Yahoo Fantasy sports. In that app, there is a banner of ads that sits smack up top (see screenshot).
I have installed the Min Min guard xposed module, and I see in my hosts file that I have a bunch of hosts with 127.0.0.1.
I added the proxy to my new APN, but I did not install adblock as in the OP since my hosts file appears to be populated correctly.
At present I cannot connect using mobile data to the internet. In Chrome, I am told "unable to connect to the proxy server", and no other apps connect to their servers. I switched back to the original APN, and data works fine.
Does anyone have any suggestions? There are plenty of threads stating that it did work.