Zte V66 User Manual page 109

Medical devices
Please consult your doctor and the device manufacturer to determine if
operation of your device may interfere with the operation of your medical
device.
Hospitals
Switch off your wireless device when requested to do so in hospitals,
clinics or health care facilities. These requests are designed to prevent
possible interference with sensitive medical equipment.
Aircraft
Switch off your wireless device whenever you are instructed to do so by
airport or airline staff.
Consult the airline staff about the use of wireless devices on board the
aircraft, if your device offers a 'flight mode' this must be enabled prior to
boarding an aircraft.
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