T-Mobile (NASDAQ: TMUS) this morning announced that this Labor Day, the Un-carrier is giving everyone – yep, even Verizon, AT&T, Comcast and Charter customers — 30 minutes of free Wi-Fi for smartphones on all Gogo-equipped domestic flights. For one day, on Monday, September 3rd, everyone gets a sample of the magenta goodness that T-Mobile customers experience on the daily!