Quick Answer
A cellular booster won't help in areas with no cellular signal, such as deep wilderness, or in situations with physical barriers like thick concrete or metal walls. It also won't improve signal quality in areas with too many users or tall surrounding structures.
No Cellular Signal
A cellular booster relies on a weak signal to amplify. If there’s no signal to begin with, a booster can’t create one. This is common in remote areas with no cell towers. A signal strength of -100 dBm or lower is usually considered too weak for a booster to work effectively.
Physical Barriers
Thick concrete or metal walls can block cellular signals, making it impossible for a booster to improve reception. In such cases, a booster will only retransmit the blocked signal, not amplify it. For example, a 10-foot thick concrete wall can attenuate a signal by 30 dB or more.
Overcrowding and Interference
In areas with heavy cellular usage, like large cities, the available bandwidth can be saturated. This can lead to poor signal quality and dropped calls, even with a booster. Similarly, tall surrounding structures like skyscrapers or hills can cause signal interference, making a booster less effective. In such cases, a different solution, like a wired internet connection or satellite internet, might be necessary.
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