Wireless phone coverage areas: Antennas & Networks
Mobile or "cell" phones work through a system of radio waves and towers or antennas to transmit calls. Since cell phones rely on radio waves, and radio waves travel though the air, completing calls can, at times, be unreliable. Like other radio transmissions, cell phone calls can be interrupted by severe weather, large buildings, or other objects between you and the nearest cell tower.
When many consumers use a carrier's network at the same time and its capacity is strained, other customers trying to connect will hear a "busy signal" instead of being able to complete their calls. The landscape and architecture of your surroundings - topography - can affect cell phone coverage, causing "dead spots." A dead spot is a local area where service is not available because the signal between the handset and the cell tower is blocked, usually by hilly terrain, excessive foliage or tall buildings.
Carriers are always working to improve and upgrade their networks in order to minimize dropped calls, busy signals, and dead spots.
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