So I'm thinking of rooting my phone (again) so that I can use a wi-fi hub app. I've got a few questions before I do anything. If I use on of the apps I don't have to pay a monthly fee like if I use the one that's pre-installed correct? I use the wi-fi a lot and might go over so I don't want to pay any overages. And second what's the best wi-fi app to use? Thanks for your help.