144Potentially Explosive EnvironmentsSwitch your phone off when in any area with a potentiallyexplosive atmosphere and obey all signs and instructions. Sparksin such areas could cause an explosion or fire resulting in bodilyinjury or even death.Users are advised to switch the phone off while at a refuelingpoint (service station). Users are reminded of the need to observerestrictions on the use of radio equipment in fuel depots (fuelstorage and distribution areas), chemical plants or where blastingoperations are in progress.Areas with a potentially explosive atmosphere are often but notalways clearly marked. They include below deck on boats,chemical transfer or storage facilities, vehicles using liquefiedpetroleum gas (such as propane or butane), areas where the aircontains chemicals or particles, such as grain, dust or metalpowders, and any other area where you would normally beadvised to turn off your vehicle engine.Emergency CallsThis phone, like any wireless phone, operates using radiosignals, wireless and landline networks as well as user-programmed functions, which cannot guarantee connection in allconditions. Therefore, you should never rely solely on anywireless phone for essential communications (medicalemergencies, for example).Remember, to make or receive any calls the phone must beswitched on and in a service area with adequate signal strength.Emergency calls may not be possible on all wireless phonenetworks or when certain network services and/or phonefeatures are in use. Check with local service providers.To make an emergency call:1. If the phone is not on, switch it on.2. Key in the emergency number for your present location (forexample, 911 or other official emergency number).Emergency numbers vary by location.3. Press the key.If certain features are in use (call barring, for example), you mayfirst need to deactivate those features before you can make anemergency call. Consult this document and your local cellularservice provider.When making an emergency call, remember to give all thenecessary information as accurately as possible. Remember thatyour phone may be the only means of communication at thescene of an accident; do not cut off the call until givenpermission to do so.