Samsung GT-B7510 사용자 설명서

To install the SIM or USIM card and battery,

If the device is on, press and hold [

] and select Power 

off to turn it off.
Remove the back cover.

Be careful not to damage your fingernails when you 

remove the back cover.

Insert the SIM or USIM card.

Place the SIM or USIM card into the device with the 

 

gold-coloured contacts facing down.
If you do not insert a SIM or USIM card, you can only 

 

use your device’s non-network services and some 

menus.