Outside of the United States, policies differ, especially in U.S. territories and insular areas like Guam; GTA Teleguam was the exclusive carrier for the iPhone since its introduction, as none of the four U.S. carriers (AT&T, Sprint, T-Mobile, and Verizon) have a presence in the area.[209] Since 2013, Docomo Pacific ended GTA's exclusivity starting with the iPhone 5.[210]