Firstly, hello and welcome to the forums.
Congratz on the two recent purchases, both a good choice in devices.
What "proxy" settings are we talking about? Do you mean you've changed settings within Adblock?
Adblock works as a proxy which can cause some apps to not work properly, personally I would use something like Adaway.
Have you rooted your devices?
Sent from my Paranoid Nexus 4 using Tapatalk 4 Beta