A d d i t i o n a l s a f e t y i n f o r m a t i o n68■ Potentially explosive environmentsSwitch off your device in any area with a potentially explosive atmosphere.Obey all posted instructions. Sparks in such areas could cause an explosion or fireresulting in bodily injury or death. Switch off the device at refuelling points such asnear gas pumps at service stations. Observe restrictions in fuel depots, storage, anddistribution areas; chemical plants; or where blasting operations are in progress.Areas with a potentially explosive atmosphere are often, but not always, clearlymarked. They include areas where you would be advised to turn off your vehicleengine, below deck on boats, chemical transfer or storage facilities and where theair contains chemicals or particles such as grain, dust, or metal powders. Youshould check with the manufacturers of vehicles using liquefied petroleum gas(such as propane or butane) to determine if this device can be safely used in theirvicinity.■ Emergency callsImportant: This device operates using radio signals, wireless networks,landline networks, and user-programmed functions. If your devicesupports voice calls over the internet (internet calls), activate both theinternet calls and the cellular device. The device may attempt to make emergencycalls over both the cellular networks and through your internet call provider if bothare activated. Connections in all conditions cannot be guaranteed. You shouldnever rely solely on any wireless device for essential communications like medicalemergencies.To make an emergency call:1. If the device is not on, switch it on. Check for adequate signal strength.Depending on your device, you may also need to complete the following:• Insert a SIM card if your device uses one.• Remove certain call restrictions you have activated in your device.• Change your profile from the offline or flight profile to an active profile.