On October 1, 2010, UAL Corporation and Continental Airlines completed the planned merger and changed the name to United Continental Holdings. Although the two airlines remained separate until the operational integration was completed by mid-2012, as of that day both airlines were corporately controlled by the same leadership. On Thursday June 27, 2019 United changed its parent company name from United Continental Holdings to United Airlines Holdings. On December 22, 2010, Continental Airlines merged operating certificates with Continental Micronesia. All Continental Micronesia flights were then branded and operated by Continental Airlines. Both carriers began merging their operations in 2011. On March 22, UCH announced that they had plans to offer Wi-Fi Service on more than 200 domestic Boeing 737 and 757 aircraft. The airlines attained a single operating certificate from the FAA on November 30, 2011. That day, all Continental flights began to use the "United" callsign in air traffic control communications which marked the end of Continental Airlines.