Motorola ic502 Phone Manual page 215

Per FCC Rule Part 15.21, changes or modifications not expressly
approved by Motorola could void the user's authority to operate
this product.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for
help.
Section 4A: Important Safety Information 201