[ 121 ]Reference informationAreas with a potentially explosive atmosphere are often but not alwaysclearly marked. They include below deck on boats; chemical transfer orstorage facilities; vehicles using liquefied petroleum gas (such as propaneor butane); areas where the air contains chemicals or particles, such asgrain, dust, or metal powders; and any other area where you would normallybe advised to turn off your vehicle engine.VehiclesOnly qualified personnel should service the phone or install the phone ina vehicle. Faulty installation or service may be dangerous and may invalidateany warranty which may apply to the unit.Check regularly that all wireless phone equipment in your vehicle is mountedand operating properly.Do not store or carry flammable liquids, gases, or explosive materials inthe same compartment as the phone, its parts, or enhancements.For vehicles equipped with an air bag, remember that an air bag inflateswith great force. Do not place objects, including both installed or portablewireless equipment in the area over the air bag or in the air bag deploymentarea. If in-vehicle wireless equipment is improperly installed and the airbag inflates, serious injury could result.AircraftSwitch off your phone before boarding an aircraft. The use of wirelesstelephones in an aircraft may be dangerous to the operation of the aircraft,disrupt the wireless telephone network, and may be illegal. Failure toobserve these instructions may lead to suspension or denial of telephoneservices to the offender, legal action, or both.• EMERGENCY CALLSImportant: This phone, like any wireless phone, operates usingradio signals, wireless, and landline networks as well as user-programmed functions. Because of this, connections in all conditionscannot be guaranteed. Therefore you should never rely solely uponany wireless phone for essential communications (for example,medical emergencies).