ContributionsMost RecentMost LikesSolutionsRe: Problems using cell phones over WiFi I tried to hook up the T-Mobile wifi extender and after wasting a full day got a somewhat straight answer from Hughs.. The ports used by T-Mobile are closed on the Gen 5, I can only assume so that we are forced to buy their service? Odd that my wifi calling worked so well when I first got hooked up and not so well now, kinda don't believe it is the ping since it worked fine for a month!!