It improves in sign, size, does not need installation, possibility of changing a vehicle to other one in seconds
None after test it for couple weeks
The product is great, very practical, just to plug the conector power of the car, capture 3 to 5 seconds in the coverage to increase in zones with low or very pour signal, in my case it has improved increasing the sign (5 bars in my celular phone) from 2 bars up to 4 inclusive 5 bars, I recommend it widely, and certify this product it works correctly in any class of vehicle.
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