United is outfitting 13 planes with faster Gogo Wi-Fi; it will be using Gogo’s latest ATG-4 system, which achieve a connection speed of 9.8Mbps per aircraft, much higher than the 3 Mbps most planes promise now. For now, the airline is only upgrading its small United Premier Service fleet, which flies between JFK, LAX, and SFO, and will start in 2013.