A method is disclosed including, using a measurement antenna in a wireless device, determining whether a user is proximate the wireless device at least by transmitting a signal using the measurement antenna; in response to a determination the user is not proximate the wireless device, transmitting the signal using a main antenna at a normal transmit power; and in response to a determination the user is proximate the wireless device, transmitting the signal using the main antenna at a limited transmit power. Another method includes in response to a determination a user is not proximate a wireless device, transmitting a signal using a first set of main antennas; and in response to a determination the user is proximate the wireless device, transmitting the signal using the second set of main antennas. Apparatus and program products are also disclosed.