After an unsuccessful union with Sprint, T-Mobile is going after its former suitor’s customers, as well as its other competitors’ subcribers in the wireless world. Today, the magenta-colored carrier announced an aggressive promotional campaign that offers a free year of LTE data to castaways from AT&T, Verizon and of course Sprint. Starting on August 29th, whenever an existing T-Mobile Simple Choice customer successfully refers someone from America’s other big three wireless carriers, the Un-carrier will reward them and their new recruit with free unlimited LTE data for one year. If you’re already a T-Mobile Simple Choice customer who with unlimited data, the carrier will give you a $10 bill credit each month for one year instead.