LG LG G3 Beat (D722K) (Black) Owner's Manual

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2  
Slide the SIM card into its slot as shown in the figure. Make sure the gold contact area on the card is facing 
downwards.
3  
Insert the battery into place by aligning the gold contacts on the phone and the battery (1) and pressing it 
down until it clicks into place (2).
Getting to know your phone