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ZTE Corporation ZTEA39 Manuale Utente

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21 
environments. In practice, the battery work time varies with different network 
conditions, work environments and modes. 
2.5  Connecting to the Network 
2.5.1 SIM 
Card 
Please insert a valid SIM card into the phone before using it.   
Don’t touch the metal surface of the SIM card in case that information in the card 
may be lost or destroyed. Keep the card away from electricity and magnetism.   
Warning: Please power off your phone before changing the SIM card. Inserting or 
removing the SIM card is forbidden when it is connected to the outer power source. 
2.5.2 
Inserting & Removing SIM Card 
  Power off your phone, disconnect the outer power source and remove the 
battery. 
  Pull the SIM card out of the SIM card slot. 
  Put SIM card into the SIM card slot.