How does a cell phone booster work in a car?

A vehicle cell phone booster pulls in weak outside cellular signal with an external antenna and transmits the signal to the booster unit inside the vehicle. Next, the booster unit amplifies the signal and sends it to the inside antenna. The inside antenna then rebroadcasts the amplified signal throughout the car.

The booster also works in reverse, receiving the signal from your phone or mobile device and sending the signal back to the nearest cellular tower. Vehicle signal boosters are specially designed for cars, trucks, SUVs, vans, RVs, boats and fleet vehicles.

Is a cell phone booster legal?

Yes, cell phone boosters are certified by the US Federal Communications Commission and Canadian Industry Canada. Most wireless providers have authorized the use of these devices to boost 2G, 3G, 4G LTE and 5G networks. Verify that your provider has approved the device you want and will consent to its use. Before using, be sure to register your booster with your carrier.

Will a cell phone booster work if there is no signal nearby?

Cell phone boosters do not create signals. There must be an existing signal outside of your vehicle for the booster to pick up and improve it. Cell phone boosters use omni-directional antennas that pull in signal from every direction for a greater chance of capturing a better signal. However, if you expect to travel in a near dead-zone, you may need a more powerful booster.

You can find cell towers along your travel route by looking up:

What are the best cell phone signal boosters for vehicles?

Cars or SUVs

The Drive Sleek offers powerful in-vehicle reception for single users in cars or SUVs. It boosts coverage for one cell phone or mobile device that fits within the adjustable cradle. This product is ideal for daily commuter use and works robustly in remote locations. The Drive Sleek provides hands-free operation with a magnetic vent clip and dashboard cradle mount.

For more than one user in your car or SUV, the Drive X and Drive Reach bring you the strongest cellular coverage available on the road. These reach faraway cell towers and amplify signal strength for multiple users or devices in remote areas.


The Drive X RV and Drive Reach RV boost cellular strength for multiple users in moving or parked RVs, campers and trailers. For signal strength for stationary use only, the Connect RV 65 offers increased coverage farthest from a tower.

Trucks and Semis

Solo drivers in trucks or semis can enjoy enhanced cell coverage during long hauls with the Drive Sleek OTR, which features an adjustable phone cradle mount, magnetic vent clip and hardware for a variety of CB-antenna mount configurations.

For solid reception for multiple users or devices, the Drive Reach OTR can reach faraway cell towers to boost coverage in remote areas.

If you need help choosing the right cell phone booster for your vehicle, reach out to us at weBoost — we’re here to help.


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