AT&T Quickfire User Manual page 160

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.
The user who makes changes or modifications to the unit
CAUTION:
without the express approval by the manufacturer will void
user authority to operate the equipment.
SAFETY
159 159