無限覆蓋
無限覆蓋 隨處 覆蓋率運行無懈可擊 AT&T是提供全美國最廣大的網絡覆蓋服務，即使在緊急事態或災難情況下商業網絡出現混亂,也能夠優先使用通信. 爲了提供在災難情況下也不間斷地穩定服務, 使用了長期積累的技術和尖端設備. These maps provide a predicted high-level approximation of wireless coverage. There are gaps in coverage that are not shown by this high-level approximation. Actual coverage may differ from map graphics and may be affected by terrain, weather, network changes, foliage, buildings, construction, signal strength, high-usage periods, customer equipment, and…
