64using liquefied petroleum gas (such as propane or butane) todetermine if this device can be safely used in their vicinity.■ Emergency callsImportant: Wireless phones, including this device,operate using radio signals, wireless networks, landlinenetworks, and user-programmed functions. Because ofthis, connections in all conditions cannot beguaranteed. You should never rely solely on any wirelessdevice for essential communications like medicalemergencies.To make an emergency call:1. If the device is not on, switch it on. Check for adequate signalstrength.2. Press the end key as many times as needed to clear the displayand ready the device for calls.3. Enter the official emergency number for your presentlocation. Emergency numbers vary by location.4. Press the call key.If certain features are in use, you may first need to turn thosefeatures off before you can make an emergency call. If the deviceis in the offline or flight profile mode, you may need to changethe profile to activate the phone function before you can make an