The Federal Trade Commission has accused T-Mobile of making “hundreds of millions of dollars” through unauthorized “premium” SMS subscriptions offered by third-parties. T-Mobile kept 35 to 40 percent of charges for “content such as flirting tips, horoscope information or celebrity gossip,” which cost users $9.99 per month, the FTC claims. It’s also said that even after T-Mobile was made aware of these fraudulent…