PowerMax North American cell boosters will amplify only the phone's Sprint signal. The Nextel signal will not be amplified and does not pass through the amplifier. Any PowerMax cell booster can be used with a Sprint/Nextel phone if only the Sprint service is used.
Some wireless carriers have not approved bi-directional amplifiers, cell boosters, repeaters or their equivalent for use on their networks. Users should consult their wireless service agreement regarding use of this product.