The vehicle itself has a strong wireless signal shielding, when it goes to a weaker signal suburb edge of the city or any other remote places, mobile phone could not receive the signal from or even access to the BTS, so that it shows no signal to make a call. With a strong UL power, the vehicle booster could support the mobile signal to transmit from and back to the BTS in a long distance.

    Solution: car booster(Eg: A33W-GD)+antenna system