I have NetNanny on my Samsung Galaxy S4 and T-Mobile is carrier...
I don't like it because you have to use NetNanny's browser and it blocks a lot of sites that are harmless.
I also don't like their customer support. Not good. Don't care. When I've called, they could care less.
Also don't like the Netnanny Icon stays in the top of your screen on your phone at all times. You can remove it temporarily but it comes right back after you reboot your phone. This is fine for somebody else, but for me, I'm trying to quit P and would rather not have somebody ask me, "Hey, why do you have NetNanny on your phone?"
Hope this helps.