ZTE Corporation 003Z User Manual

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explosive environments 
petrol stations and other explosive atmospheres 
One tiny spark can cause a massive explosion. So please obey all signs and 
requests to turn off wireless devices, such as your phone. 
Areas with potentially volatile or explosive atmospheres include fuelling areas, 
below deck on boats, chemical transfer/storage facilities, and places where the air 
contains chemicals or particles, such as grain, dust, or metal powders. 
blasting areas 
Switch off your mobile phone or wireless device when in or near blasting areas, 
such as quarries. Not just because of the danger from explosives, but also because 
of the interference your phone may cause with blasting operations.