ZTE Corporation A139PLUS Manuale Utente

26 

„ 

Put the phone at a ventilated place with temperature between + 5℃ - + 40

. 

℃ Use 

only the supplied or approved chargers. Using unauthorized charger may cause 

danger and violate the authorization and warranty rules of the phone. 

„ 

Charge the battery in time when your phone automatically powers off or displays a 

warning “Battery low”.   

„ 

The conversation time and standby time of the phone lie on ideal working 

environments. In practice, the battery working time varies with different network 

conditions, working environments and modes. 

Connecting to the Network 

Don’t touch the metal contact area of the SIM card (Subscriber Identity Module 

card). Doing so may cause information in the card lost or destroyed. Keep the card 

away from electricity and magnetism.