83Emergency callsgas (such as propane or butane), and areas where the aircontains chemicals or particles such as grain, dust or metalpowders.Follow any restrictions. Do not use the device where blasting isin progress.Emergency callsImportant: Wireless phones, including this device, operateusing radio signals, wireless networks, landline networks, anduser-programmed functions. Because of this, connections in allconditions cannot be guaranteed. You should never rely solelyon any wireless device for essential communications likemedical emergencies.To make an emergency call:1. If the device is not on, switch it on. Check for adequatesignal strength. Some networks may require that a validSIM card is properly inserted in the device.2. Press the End button as many times as needed to clear thedisplay and ready the device for calls.3. Enter the official emergency number for your presentlocation. Emergency numbers vary by location.4. Press the Call button.If certain features are in use, you may first need to turn thosefeatures off before you can make an emergency call. Consultthis guide or your service provider for more information.When making an emergency call, give all the necessaryinformation as accurately as possible. Your wireless device maybe the only means of communication at the scene of anaccident. Do not end the call until given permission to do so.