1)First you will need to check to ensure that it has be approved by Comreg. If it does not, it could be an illegal device. If so return it right away and report the seller to the FCC 2)If you find that it has been approved under the new rules but still does not help improve the cell signal, you will need to check installation manual to ensure that it has been installed properly. If this does not help then you will need to call the Manufacturer tech support line. They will review your specific location , repeater purchased and other site specific details to establish what the reason for no signal improvement might be.